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Ruri (ルリ Ruri) is a descendant of modern-day humans. She is Kohaku's elder sister and the daughter of Kokuyo, and serves as the priestess in Ishigami Village.


Ruri Icons.png

Ruri is a young woman with a delicate face, long blonde hair, and green eyes. She appears to have a mix of Japanese and American descent, denoting her heritage as a descendant of Byakuya Ishigami and Lillian Weinberg. She shares similar facial features with her younger sister, Kohaku, but has longer, manageable hair and a more curvy body type; Ginro crudely pointed out that Ruri has bigger breasts than Kohaku.

She wears a primitively-made purple sundress and a rope around her neck. When Yuzuriha built a fashion store, Ruri wore a more modern dress.[9]


Ruri is a kind, gentle and demure young woman with a submissive personality, as she was fine with marrying whoever won the Grand Bout. This was perhaps due to her illness and frailty; she was resigned to her fate of a short life.[10]

When Kohaku shows up right after being rescued from under the fallen tree by Senku, she notices something off with how her ponytail is tied, and concludes some accident must've happened. She then pleads Kohaku not to push herself for her own sake, showing that she cares much about her sister's well-being, despite her own health being in a rapidly deteriorating state.

When she learned of Senku's presence in the village, she showed curiosity and a keen memory, his name managing to stir up memories of one of Ishigami Village's stories.

After making a full recovery from her illness, Ruri is shown to be more optimistic and positive and even shows a more tomboyish side, immediately making a full dash running around the village. Despite this, she is still much more feminine than Kohaku.

She also displays a more assertive side, at one point shoving Minami towards Tsukasa so she could join the happy reunion, despite Minami's initial hesitation as she felt Mirai (as Tsukasa's biological sister) had precedence.[11]


Ruri's position as the village priestess has meant that she has had to practice some degree of leadership (though she is subject to the rules of her religious duty, as well as the chief to a great degree). This can be seen for instance, when she quickly issues commands to Jasper and Turquoise when the village is attacked by Homura. In the anime, it was elaborated that it was her who told Kokuyo to pass his position of chief onto Senku.

Ruri is shown to share some of Kohaku's athletic prowess, as her first instinct when she is cured is to sprint off into a field at high speed. Kaseki comments that she has done so many times in the past. She is also strong, as she easily picked up her sister just after reviving.

She is very observant, as she was able to tell Kohaku went through some kind of turmoil, by taking note of how her hair was tied slightly differently, something most wouldn't have noticed. She also took note of Minami's affection for Tsukasa.

Besides her athletic capabilities, she also has some degree of fine motor skills, as it was pointed out that sewing clothes is one of the activities Ruri keeps herself occupied with, providing her sewing needle made of bone to be used as the stylus for a record player. Previously she had also helped Gen craft the hundreds of carbon-zinc cells used in the batteries for the cellphone.


Ruri was born to the Village Chief in Ishigami Village roughly eighteen years prior to Senku's arrival to the village. During her childhood, Ruri would hear tales of Senku Ishigami and how he is meant to save the village.

As a child she befriended Chrome, with whom she spent a lot of time playing outdoors with. She contracted Pneumonia at this age, and was told by the village elders that she wouldn't live long. Chrome promised her that he would search everywhere and turn every stone in the search for a cure, while Kohaku tried helping her illness by manually carrying hot spring water for her to bathe in; something that really helped slow it's progress as Senku later explained, and probably being the reason she managed to survive so long with the illness into adulthood.


Kingdom of Science Arc

She is introduced as the village priestess. As Kohaku brings her water, she is questioned for not showing up the previous night, to which she lies saying she fell asleep in the forest, and gets berated by Turquoise on her carelessness; Ruri then requests the two leave the sisters alone. The two refuse, saying they can't leave the priestess on her own - to which Ruri pleads by bowing. As the two finally leave, Ruri scolds Kohaku since she deduces something must've happened to cause Kohaku's ponytail to come unbound. She then tells Kohaku to not push herself so much for her sake, since she's destined to die soon anyway.[10]

Village Games Arc

Once Senku finally steps foot into the village, Ruri recalls his name being familiar.[12] She approaches Senku and asks what his family name is, most villagers not knowing what that means. When she mutters the first few letters of Senku's surname, she collapses, weakened from her disease.[13]

Ruri is relieved to see Chrome win the battle against Magma. Ginro takes note that he is aware Ruri wants Chrome to win and that she shouldn't worry as Senku will surrender the match. Out of respect for her position, the priestess states that she doesn't possess such desires and that since this is a divine festival, she will accept whomever wins the competition. A confused Ginro then wrongly concludes that she is indeed fine with any winner and maniacally attacks Senku, only to be defeated and thrown out of the competition. Senku them moves into the finals, where Chrome faints due to his previous fight with Magma, thereby making Senku the winner, much to Ruri's shock.[14]

After Senku won the Village tournament by accident (he was supposed to surrender to Chrome, who fainted from his last match), he was in the position where he would be crowned chief and take over the village if he chose to marry Ruri, and much to her shock, he does without hesitation. A few minutes later, she starts coughing blood into her hands. Noting that they must finish the medicine as soon as possible, Senku calls all the science team to leave with him back to the lab; but when Genbu stops him saying they must celebrate his wedding, Senku, with just as little hesitation, demands a divorce. Shocked and astonished, her and the villagers watch as Senku and company flee the scene, taking them the wine and vinegar the villagers had brought out. Ruri pointed out that to her knowledge, she was the first ever divorced priestess.

After Senku diagnosed Ruri with pneumonia, she was willing to take the risk of modern-day medicine, consuming antibiotics for the first time.[15] After swallowing the antibiotic Senku gave her, she is inspected by the latter who concludes there is a fluid buildup in her lungs. A little while later, her condition suddenly turns to worse, with Jasper commenting that he has never seen her in such a state. Kokuyo blames Senku on her current condition and grabs him. Senku agrees that the sulfa drug could have caused her to get sicker; shocking the group at first. However, he goes on to explain that the targeted bacteria is mobilizing more reinforcements now that its existence is threatened, a special ability of streptococcus pneumoniae.

Senku declares victory over the pathogen as the drug they made will kill the bacteria. Kokuyo frustratingly attacks Senku again, only to be stopped by Kohaku, who states that she believes in science and in Senku. The rest of the group nods in unison. After taking continuous doses of the drug, Ruri eventually overcomes the disease, being able to walk normally again. Kokuyo and Kohaku cry tears of happiness as Ruri celebrates her recovery by running, having forgotten the last time she stepped out of the village or was active at all.[16]

Village Origins Arc

Once Kokuyo accepts Senku as the new village chief, the latter comes to know the name of the village being Ishigami. He is then approached by Ruri who informs Senku she's always known his full name - that being Senku Ishigami.[17] Ruri reveals that Ishigami Village was founded by Byakuya Ishigami and his crew, and Senku Ishigami is widely famous amongst the village community throughout every generation, as Ruri fully remembered her mother’s story about Senku - the last of the hundred tales passed throughout the village's generations.[18] Her explanation causes Senku to understand why there are still humans around.

She tells Chrome, Kohaku and Senku about this tale, then as they celebrate, she leads Senku to the village cementery, where he is presented with Byakuya's grave marker, brought over from the island they landed in. She lets senku know the last part of the story she doesn't usually tell, a message to Senku from Byakuya. Once she conveys the tale, she leaves Senku alone at his father's grave while shedding a tear herself.[19]

Vs. Hyoga Arc

When Homura sets the village ablaze, Ruri tells the worried Jasper and Turquoise to forget her and rescue the children.[20] She enjoys the wonders of a new sweet called cotton candy made by Senku along with her sister. As Senku goads Homura into trying the candy, Ruri recognizes that Senku didn't offer her such pleasure purely for strategic purposes, but also for comfort as she was spying on them all alone for exceedingly long periods of time.[21]

Communications Arc

Ruri is present when Senku creates cotton candy and is amazed by the taste.[22] She aids in making batteries and is seen helping create wine.[23] The priestess is seen once again, now admiring the newly brought jewels from Senku, Chrome and Magma's cave expedition.[24]

When the phone is complete, the village tried to encourage Chrome to confess his feelings to Ruri through the stone world's first telephone call, though he instead cheers to her about how great science is, and this brings a smile to her. After comparing Senku's phone to a bee and telling him a tale about a bee communicating with the dead, he realizes that Byakuya left a recording message for him.[25]

Once the record player is made, Ruri is amazed by hearing the recording of Senku's father and the song sung by Lillian Weinberg.[26]

Age of Exploration Arc

Ruri is encouraged by Ginro to confess to Chrome, she blushes at the notion and tries to go through with it but fails because of their call being interrupted by Why-man's debut.[27]

Treasure Island Arc

Ruri is amazed to see Ginro jump into the ocean, despite previously refusing to go.[3]

Senku previously asked Ruri about the 100 tales and she bores him with most of them. Very soon, she tells him about the islanders where the founders originally landed.[28]

While on route to Treasure Island, the Perseus crew contact Japan and update the people who stayed behind on there being other Stone World humans elsewhere. Ruri was amazed by the possibility and deduced they may be distant relatives of a branch who set for Japan.[29]

After the conflict on Treasure Island is done, Ruri soon contacts Senku and he updates her.[30]

New America City Arc

Ruri is happy when the Perseus returns and to see that the modern people have lost their scars, meaning they found the secret of Petrification. Indeed, Chrome reveals the Petrification Weapon and Ruri remarks that the dreaded petrification can now be used to heal everyone. After Tsukasa is revived, she watches Minami choose to let him reunite with his sister first but Ruri pushed her into talking to him, while Nikki notes on Ruri's assertive nature.[11]

South America Arc

She witnesses the Petrification beam heading over the horizon. Her father then has her and the villagers curl into a defensive position so they will not be damaged while petrified. She is then petrified with the villagers.[31]

Globetrotting Arc

Nine years after petrifying, Ruri and the others were revived by the returning members of the Kingdom of Science. She picks up her sister in their reunion, while Kohaku comments she hasn't changed a bit. Ruri reunites with Chrome (who was punished by Kohaku for calling them gorillas) and is hopeful when he talks with her but takes it in stride at his usual obliviousness. She soon explains she and the others did not create the wall, which protected the petrified villagers before it is revealed that it was made by Sagara and Chalk.[5]

Moon Mission Arc

Chapter Appearances

Chapter Appearances
Kingdom of Science Arc
13. Part 1: Stone World: The Beginning Absent
14. Those Who Have Faith Absent
15. Two Kingdoms of the Stone World Absent
16. Kohaku Absent
17. Nasty Looks Pictured
18. Sorcery Showdown Absent
19. Two Million Years of Being Debut
20. Stone Road Appears
21. Dawn of Iron Pictured
22. Survival Gourmet Absent
23. The Smooth Talker Appears
24. Lightning Speed!!! Absent
25. By These Hands, the Light of Science Absent
26. A Shadow Alliance Absent
27. A Certain Scientists Wish Pictured
28. Clear World Absent
29. Senku's Lab Pictured
30. Death Green Absent
31. Friends Have Each Other's Backs Flashback
32. Brain & Heart Absent
33. Baaad Chemicals Appears
Village Games Arc
34. Sneaky Grand Bout Strategy Appears
35. The Masked Warrior Appears
36. Kinro and Ginro Pictured
37. Science-User Chrome Appears
38. Master of Flame Pictured
39. And the Winner is... Appears
40. Two Million Years in the Making Appears
Village Origins Arc
41. Doctor Stone Appears
42. Tale for the Ages Appears
43. Humanity's Final Six Absent
44. One Hundred Nights, One Thousand Skies Pictured
45. Epilogue of Part 1 (End of Part 1) Part 2: Stone Wars Appears
Vs. Hyoga Arc
46. Stone Wars Absent
47. Science Vs. Power Absent
48. Blades of Science Absent
49. To the Present Appears
50. Humanity's Greatest Weapon Absent
Communications Arc
51. Sweets for the Stone World Appears
52. Age of Energy Absent
53. Hard Knocks Crafting Club Pictured
54. Flickering Blue Jewel Pictured
55. Treasure Dungeon Push Start Absent
56. The Treasure Absent
57. Heat Heart Appears
58. Wave of Science Appears
59. Voices from Here to Infinity Appears
60. Angel's Song, Devil's Whisper Appears
61. Stone Wars Begin Absent
62. Double Chase Absent
63. Information Warfare Absent
64. Hotline Absent
65. Call From the Dead Appears
66. Liars and Truth Tellers Absent
67. Full Mobilization Absent
68. Flame of Revolution Absent
69. Steam Gorilla Appears
70. Paper Shield Absent
71. Prison Break Flashback
72. Experience Points Appears
73. Top-Secret Mission Absent
74. Fateful 20 Seconds Absent
75. 20-Second Countdown Absent
76. Final Battle Absent
77. The Power of Science Absent
78. That Which Destroys or Saves Absent
79. For This Very Moment Absent
80. Humanity's Strongest Tag Team Absent
81. Fingertip Absent
82. Epilogue of Stone Wars (End of Part 2) Absent
Age of Exploration Arc
83. Dr. Stone Absent
84. People = Power Absent
85. Ultimate Resource Appears
86. Money Absent
87. Senku's Department Store Appears
88. Wings of Humanity Absent
89. Adventures Absent
90. New World Map Absent
91. Need Bread? Start with Wheat Absent
92. Desire is Noble Absent
93. The First Shot Is Yours Absent
94. The Scent of Black Gold Appears
95. First Contact Appears
96. Eye of Science Appears
97. The Joy of Leadership Absent
98. Ryusui Absent
99. Kingdom of Science Photo Journal Appears
100. Origin of the 100 Tales Appears
Treasure Island Arc
101. Treasure Chest Flashback
102. Perseus, Ship of Science Appears
103. Light of Hope and Despair Absent
104. Men of Forensics Absent
105. The Island's Great Beauty Absent
106. The Secret of Petrification Absent
107. To the Trump Card Science Vessel Absent
108. Two Trump Cards Absent
109. The Great Escape Absent
110. Beautiful Science Absent
111. Science Wars Absent
112. King of Three Dimensions Absent
113. Cryptography Science Absent
114. Silently, Science Pierces the Stone Absent
115. One Second, One Grain Flashback
116. Miracle in Hand Absent
117. The Kingdom of Science Strikes Back Absent
118. Silent Soldiers Absent
119. Science Soldiers Absent
120. Top Secret Absent
121. Medusa's True Face Absent
122. Brain-Battle Puzzle Pieces Absent
123. The Battle of Wits' Deal Game Absent
124. The Invention of God and the Devil Absent
125. The Decisive Three-Dimensional Battle Absent
126. A 3-D Strategy Absent
127. Medusa and Perseus Absent
128. Island-Wide Battle Royale Absent
129. Joker Absent
130. Devil's Choice Absent
131. Nasty Crimes Absent
132. The Strongest Weapon Is... Absent
133. Flash of Destruction Absent
134. Commander Faceoff Absent
135. Counting Absent
136. Medusa Vs. Science Absent
137. Last Man Standing Appears
138. End Of Part 3 Appears
New America City Arc
139. First Dream Absent
140. New World Plots Absent
141. First Team Appears
142. World Power Pictured
143. Ryusui vs. Senku Absent
144. Ryusui & Gen vs. Senku & Kohaku Pictured
145. Bar Francois Absent
146. Bar Francois: Bitters Absent
147. Science Journey Appears
148. Pioneers of Earth Absent
149. Light Lure in Darkness Absent
150. Righteous Science User Absent
151. Dr. X Absent
152. Doctor Vs. Doctor Absent
153. Science Wars Absent
154. Spy vs. Spy Absent
155. Science Is Elegant Absent
156. Two Scientists Absent
157. Same Time, Same Place Absent
158. Who's the Scientist? Absent
159. Lock On Absent
160. Gunshots Echo Absent
161. Craft Wars Absent
162. Down the Earth-Stained Path Absent
163. Multifront Final Battle Absent
164. Re-Lock On Absent
165. Know the Rules, Make the Rules Absent
166. Ultimate Knight Absent
167. Different Strokes Absent
168. Corn City: Population One Million Absent
169. RISK or HEART Absent
South America Arc
170. Staring Up at the Same Moon Absent
171. Staring at the Same Light Absent
172. Marked with an "X" of Wisdom Absent
173. Earth Race Absent
174. The Specter of the Panama Canal Absent
175. Ultra Race Across South America Absent
176. Net-Breaking Battle Plan Absent
177. Medusa Mechanism Absent
178. Science Scales Mountains Absent
179. Bonds on the High-Wire Mentioned
180. Sickening Yet Beautiful Absent
181. New World Science Absent
182. Diamond Heart Absent
183. Stone Sanctuary Absent
184. Fort Medusa Absent
185. Lovely Cleavage Plane Absent
186. To Each Their Own Blade Absent
187. Cyber Guerilla Absent
188. What I Once Sought to Destroy Absent
189. Our Dr. Stone Absent
190. Science Transcends Life Absent
191. Divine Scream, Down to Earth Absent
192. Until We Meet Again Mentioned
193. Our Stone World Pictured
New Stone World Arc
194. Homo Sapiens, All Alone Petrified
195. Treasure Hunter, All Alone Absent
196. Scientist, All Alone Absent
197. A Stony Eden and Its Forbidden Fruit Absent
198. Whole New World Absent
199. Superalloys Absent
200. Future Engine Absent
Globetrotting Arc
201. Morse Talk Absent
202. Ryusui Corp. Absent
203. Missile Heart Absent
204. The Universe is Written in the Language of Mathematics Mentioned
205. Universe of Zeroes and Ones Absent
206. Dawn of the Computer Absent
207. Linking the Circuit Diagram Absent
208. Science Transcends Humanity Absent
209. The Rocket's Hard Truth Absent
210. Not One-Way Absent
211. World Tour for Resources Petrified
212. Final Part: Stone to Space Appears
Moon Mission Arc
213. Unknown Known Absent
214. Stone World's Earth Defense Force Appears
215. Long, Long Road Absent
216. Hello, World Absent
217. Science Underdogs Absent
218. WWW (World Wide Workshop) Absent
219. Three Heroes Pictured
220. A Desire for All Absent
221. Entrusting It All Absent
222. Science Road Appears
223. 0 Appears
224. In Space Absent
225. Docking Absent
226. Giant Step Absent
227. It Was You Absent
228. Life Stone Absent
229. Why-Man Absent
230. Human Absent
231. A Future To Get Excited About Absent
232. Final Chapter: Dr. STONE Appears


  • Her name Ruri is the Japanese word for Lapis Lazuli. It is a type of metamorphic rock of an intense blue color, that in many cultures was associated with the heavens and the divine, such as in ancient egypt where it was used in a variety of items such as amulets and figurines, and early christians considered it to be the stone of virgin Mary.[32]
  • She appears to be rather popular as Chrome, Magma, Ginro, and Kinro have all shown an attraction towards her (or at least an interest in marrying her) though she married Senku (for only three minutes before he divorced her due to his lack of interest in romance).
    • Chrome's feelings are the most sincere and genuine (though the romantic qualities of them remain ambiguous for most of the story) and it is implied in later chapters that she in fact reciprocates his feelings.
    • Magma was interested in marrying her in order to become the new village chief, and initially it seemed that he saw her more like a trophy of his victory (even going as far as considering taking both sisters as his wives), but he changed his mind later when seeing how deteriorated her health was, instead planning to kill her once he's taken the position of chief.
    • Ginro lusted after her, quite obviously and everyone cheered for Senku after he beat him.
    • Kinro likely had more noble motives, as he agreed to do it after having Kohaku explain her motives to him.
  • Her illness was initially unknown. Senku deduced based on how her lungs sounded that she had liquid in her lungs. After dissecting a rat that was found dead near her living space, he further diagnosed that the inflamation in her lungs was caused by bacteria that's also infecting the rats. After Senku made an antibiotic (sulfanilamide) to cure her illness and she had an adverse reaction where the bacteria started to act up by horizontal gene transfer (making other inoffensive bacteria in her lungs infectious by passing some of its genes into them), Senku identified this phenomenon as a signature move of Streptococcus Pneumoniae, the bacteria that causes pneumonia, and which can be treated with sulfanilamides.[33]
  • A recurring gag involves her and Senku's previous marriage and divorce being referenced:
    • When Hyoga approaches Senku to form a partnership, Senku tries to brush it off by asking if it was his version of an awkward love confession and then states how he is married (and then corrects that he is now divorced).
    • When Amaryllis asks about Chrome's relationship with Ruri, Francois points out that Ruri was once married to Senku before Senku divorced her, shocking Taiju and Amaryllis.
    • When Luna asks Francois about dating Senku, Kinro brings up how Senku is a divorcé, to her shock.
  • She and her sister were originally two years apart but thanks to the second petrification event they are now the same age biologically.
  • Ruri's English voice actress is currently engaged to Ryusui's voice actor.


  1. Dr. Stone Manga: Volume 22 — Extras
  2. Dr. Stone Manga: Volume 4 — Q&A
  3. 3.0 3.1 Dr. Stone Manga: Chapter 99
  4. Dr. Stone Manga: Chapter 216
  5. 5.0 5.1 5.2 5.3 Dr. Stone Manga: Chapter 212
  6. 6.0 6.1 Dr. Stone: Kingdom of Science Encyclopedia, Page 64
  7. Dr. Stone Manga: Volume 19 — Extras
  8. Dr. Stone Manga: Chapter 193, Page 11, Ruri is petrified along with the rest of the world.
  9. Dr. Stone Manga: Chapter 87, Page 16
  10. 10.0 10.1 Dr. Stone Manga: Chapter 19, Page 12
  11. 11.0 11.1 Dr. Stone Manga: Chapter 141, Page 11
  12. Dr. Stone Manga: Chapter 33, Page 18
  13. Dr. Stone Manga: Chapter 34, Page 4
  14. Dr. Stone Manga: Chapter 39, Page 19
  15. Dr. Stone Manga: Chapter 40, Page 23
  16. Dr. Stone Manga: Chapter 41, Page 17
  17. Dr. Stone Manga: Chapter 41, Page 19
  18. Dr. Stone Manga: Chapter 42, Page 3
  19. Dr. Stone Manga: Chapter 45, Page 15
  20. Dr. Stone Manga: Chapter 49, Page 4
  21. Dr. Stone Manga: Chapter 51, Page 18
  22. Dr. Stone Manga: Chapter 51, Page 12
  23. Dr. Stone Manga: Chapter 53, Page 11
  24. Dr. Stone Manga: Chapter 57, Page 2
  25. Dr. Stone Manga: Chapter 59, Page 11
  26. Dr. Stone Manga: Chapter 60, Page 12
  27. Dr. Stone Manga: Chapter 95, Pages 20 - 23
  28. Dr. Stone Manga: Chapter 100, Page 25
  29. Dr. Stone Manga: Chapter 102, Page 2
  30. Dr. Stone Manga: Chapter 138, Page 14
  31. Dr. Stone Manga: Chapter 192, Page 21
  32. Lapislazuli on Wikipedia
  33. Dr. Stone Manga: Chapter 41

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Ishigami Villagers
Male AlabasterArgoCarboChromeGanenGenbuGinroHaganeJasperKasekiKinroKokuyoMagmaMantleNatriSaganShoSoyuzTetsukenTitanUnmo
Female AlumiAzuraBerylDiaEnGarnetKohakuKujakuNamariRubyRuriSangoSapphireShiroganeShovelSuikaSuzuTurquoise
Unknown ChalkSagara
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Kingdom of Science
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Female Chelsea ChildeHomura MomijiKohakuMinami HokutozaiMirai ShishioNikki HanadaRuriSuikaYuzuriha Ogawa
Unknown Francois
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