Suika (スイカ) is a descendant of modern humans and an inhabitant of Ishigami village. She is one of the main protagonists of Dr. Stone and serves as a scout for the Kingdom of Science.


She is a caring, inquisitive individual with a talent for spying. She seems rather shy, mostly because people saw her as weird for wearing a watermelon over her head (revealed to be because she has bad eyesight and looking through the watermelon allows her to see a little better due to the pinhole effect). She has since become one of Senku's closest allies. She is moved when Senku does not ask her about the watermelon she wears or calls her weird for wearing it (though it was most likely because he does not care). However, once Senku makes glass lens for her using the watermelon head, she is grateful for him fixing her bad eyesight and declines to get more "normal practical" glasses, opting to keep her watermelon head. She is shown to be brave, as she purposely leads the Empire of Might troops away from the village by using herself as bait. She also enjoys helping Senku and her friends. For example, when Senku needs volunteers to spin thread, she immediately volunteers herself and the other kids, stating that she would prove they could be useful. As a child, she is curious and enjoys exploring. She also occasionally doesn't understand some of the more "adult" topics discussed, such as wondering what the village sisters mean when they say boyfriend or wondering what a harem is. Nonetheless, she has proven to be intelligent as she managed to understand Gen's path and his message based on some flowers he left behind. Similarly, she is observant enough to understand that Kinro has the same bad eyesight problem she has after watching him fight for only a few minutes.

Possibly due to her lonely childhood being ostracized for wearing a watermelon head and lack of coordination due to her nearsightedness, she is quick to make friends and is very friendly and kind. She immediately becomes friends with Mirai and states how happy she is to have a female friend her age. She also wants to be of help to others and dislikes it when she can't help others. She seems fond of animals, having a pet dog named Chalk and she bonds with a pig that Francois planned to use as an entree, to which which Senku and Francois relented and allowed her to keep it as a pet, to her joy.


Suika is a young girl of short stature with blonde hair in a bowl cut being described as cute by many of the other characters.

She tends to wear a helmet made from a melon rind to help her see better because she has a disease called "blurry sickness" or in modern terms: nearsightedness. Senku created a pair of glass lens in her helmet to help her eyesight. She wears a black dress that covers her whole body and has a rope attached to her neck like a necklace and it is common for her tribe to wear them most, especially for girls.


Since Suika had the blurry eye disease (nearsightedness), she constantly scrunched up her face in an attempt to see things. This ended up scaring people, so she started to wear her trademark melon helmet.


Kingdom of Science Arc

She helps collect iron sand.

She overhears a conversation that Magma killed Gen Asagiri and that he plans to let Ruri die.

When Senku unmasks her and learns of her bad eyesight, he decides to make glasses for her. She aids Senku in getting the materials to make glasses for her.

Village Games Arc

She throws her mask to Kinro in order for him to be able to see better during his fight against Magma, but in the end, he gets beaten. She gets kidnapped by Mantle in order to use her in a plan to get Kohaku disqualified and they succeed. Chrome then uses her mask's lens together with his sweat in order to act as a magnifying glass to burn Magma's clothes and uses that chance to push Magma out of the stage. Senku then uses the mask as a fulcrum for his stick and with it, he beats Ginro during the Village Games.

Vs. Hyoga Arc

She allows herself to serve as a distraction to save her fellow children from Hyoga's men. She leads them to the acid fields.

Age of Exploration Arc

When Ryusui invents his own currency, she opens up a ramen shop. She and Sagara find the oil fields.

Treasure Island Arc

She sneaks onboard Senku's ship. She avoids becoming petrified after Ryusui kicks her off the ship. She and Ginro manage to get the mobile lab. Later on she is ecstatic to see Ryusui revived and is congratulated by him with him delcaring her to be an true warrior for the kingdom of science. She assists in the reconstruction of the statue of the great leader only to be peterfied along with everyone else except Senku when Ibara peterfies the entire island.

Abilities and Equipment

Stealth Master

Suika is trusted by Senku and his friends to let her go on scouting. She is able to roll herself inside the melon hat, allowing her to recon deep into enemy territory undetected. Suika is able to slip past through hostile units when she attempts to retrieve the mobile lab from Perseus after the whole crew, with the exception of her and Ginro, are petrified by an unknown opponent. She is highly dependable when it comes to scouting.

Knowledge of Forests and Animals

She is stated by Francios to be the foremost expert of the forests and animals surrounding Ishigami Village.


She is shown to be intelligent and observant, quickly deducing Kinro was losing the fight against Magma because he is nearsighted like her and he couldn't judge the proper distance to attack him.


  • Her name Suika is the Japanese word for Watermelon
    • This comes from the watermelon she wears over her head, which comes from a plant of the species Citrullus lanatus, bearing a melon-like fruit.


  1. Dr. Stone Manga; Volume 4, Q&A Section
  2. Chapter 99


v  e
Kingdom of Science
Male Taiju OkiSenku IshigamiGen AsagiriChromeKasekiKinroGinroMagmaRyusui Nanami
Female Yuzuriha OgawaRuriKohakuSuikaNikkiMinami
v  e
Post Petrification Humans
Male ChromeGinroJasperKasekiKokuyoKinroMagmaMantleSoyuzTetsuken
Female GarnetKohakuRubyRuriSapphireSuikaShiroganeShovelTurquoise
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