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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 blond 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, hourglass-shaped figure; 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.[6]


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.[7]

She notices something off with Kohaku 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 in a rapidly deteriorating.

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.[8]


Ruri may 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.

She is very observant, as she was able to tell Kohaku was in a dangerous situation, simply because her hair knot was different, something most wouldn't have noticed. She also noted on the affections Minami possessed for Tsukasa.


Ruri was born to the Village Chief in Ishigami Village at some point in time. During her childhood, Ruri would hear tales of Senku Ishigami and how he is meant to save the village.

She eventually became extremely sick around her 18th birthday. Kohaku managed to sustain her life using hot water that she gathered every day to slow down the progression of her illness.


Kingdom of Science Arc

She is introduced as the village priestess. As Kohaku brings her water she is questioned for the number of barrels she's brought. Kohaku simply responds with falling asleep and not paying attention, as she is berated by Jasper and Turquoise on her clumsiness. 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 that Kohaku's hair knot fell over. She then tells Kohaku to not push herself so much for her sake, since she's destined to die soon anyway.[7]

Village Games Arc

Once Senku finally steps foot into the village, Ruri recalls his name being familiar.[9] 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.[10]

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.[11]

After Senku won the Village tournament by accident (he was supposed to surrender to Chrome, who fainted from his last match), he was crowned chief. Senku immediately married Ruri, who blushed at his quick acceptance. She is shocked they divorced almost immediately afterward but her sister assures her its his way to discover her illness.

After Senku diagnosed Ruri with pneumonia, she was willing to take the risk of modern-day medicine, consuming antibiotics for the first time.[12] 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 worsened 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 make treats the disease. Ruri's father 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.[13]

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.[13] 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’s legend - a part of the hundred tales passed throughout the village's generations.[14] Her explanation causes Senku to understand why there are still humans around.

As she tells Chrome, Kohaku and Senku about a part of a hundred tales, she leads Senku to his father's grave, letting him know of the last part of the story - the one Byakuya intended for his son only. Once she conveys the tale, she leaves Senku alone at his father's grave while shedding a tear herself.[15]

Vs. Hyoga Arc

When Homura Momiji sets the village ablaze, Ruri tells the worried Jasper and Turquoise to forget her and rescue the children.[16] 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.[17]

Communications Arc

Ruri is present when Senku creates cotton candy and is amazed by the taste.[18] She aids in making batteries and is seen helping create wine.[19] The priestess is seen once again, now admiring the newly brought jewels from Senku, Chrome and Magma's cave expedition.[20]

When the phone is complete, the village tried to encourage Chrome to confess his feelings to Ruri, though he instead compliments the usage of a phone to her, as she smiles at this. 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.[21]

Once the record player is made, Ruri is amazed by hearing the recording of Senku's father and the song sung by Lillian Weinberg.[22]

Age of Exploration Arc

Ruri is encouraged by Ginro to confess to Chrome, as she blushes at the notion and tries to go through with it but fails because of the loss of Signal.[23]

Treasure Island Arc

Ruri is amazed to see Ginro jump into the ocean, despite previously refusing to go.[2]

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.[24]

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.[25]

After the conflict on Treasure Island is done, Ruri soon contacts Senku and he updates her.[26]

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. 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.[27]

South America Arc

She witnesses the Petrification beam heading over the horizon. Her father then has her and the villagers meaning assume a defensive position so they will not be damaged while stone. She is then petrified with the villagers.[4]

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
Europe 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


  • Her name Ruri is the Japanese word for Lapis Lazuli. It is a type of metamorphic rock.
  • 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 and it is implied in later chapters that she in fact reciprocates his feelings.
    • Magma only wanted to marry her in order to become the new village chief and was even planning to kill her if her illness did not.
    • Ginro lusted after her, quite obviously and everyone cheered for Senku after he beat him.
    • Kinro likely had more noble motives, believing in the rules as he does.
  • Her illness was initially unknown. Senku deduced based on how her lungs sounded that she had water in her lungs. After dissecting a rat, he further diagnosed that the inflamation in her lungs was caused by bacteria passed from rats. After Senku made an antibiotic (sulfanilamide) to cure her illness and she had an adverse reaction where the bacteria started to act up as the number of infectious bacteria increased, he deduced she was infected with Streptococcus pneumoniae, which has the ability to hijack surrounding harmless bacteria with their own toxic genes to multiply the number of infectious bacteria in the body. In other words, the name of her disease was pneumonia.[13]


  1. Dr. Stone Manga: Volume 4 — Q&A
  2. 2.0 2.1 Dr. Stone Manga: Chapter 99
  3. Dr. Stone Manga: Volume 19 — Extras
  4. 4.0 4.1 Dr. Stone Manga: Chapter 192
  5. Dr. Stone Manga — Chapter 192, Ruri is petrified along with the rest of the world.
  6. Dr. Stone Manga: Chapter 87
  7. 7.0 7.1 Dr. Stone Manga: Chapter 19
  8. Dr. Stone Manga: Chapter 140
  9. Dr. Stone Manga: Chapter 33
  10. Dr. Stone Manga: Chapter 34
  11. Dr. Stone Manga: Chapter 39
  12. Dr. Stone Manga: Chapter 40
  13. 13.0 13.1 13.2 Dr. Stone Manga: Chapter 41
  14. Dr. Stone Manga: Chapter 42
  15. Dr. Stone Manga: Chapter 45
  16. Dr. Stone Manga: Chapter 49
  17. Dr. Stone Manga: Chapter 51
  18. Dr. Stone Manga: Chapter 52
  19. Dr. Stone Manga: Chapter 53
  20. Dr. Stone Manga: Chapter 57
  21. Dr. Stone Manga: Chapter 59
  22. Dr. Stone Manga: Chapter 60
  23. Dr. Stone Manga: Chapter 95, Pages 20 - 23
  24. Dr. Stone Manga: Chapter 100
  25. Dr. Stone Manga: Chapter 102
  26. Dr. Stone Manga: Chapter 138
  27. Dr. Stone Manga: Chapter 141

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