Dr. Stone: Pre-Stone World / Characters

Dr. STONE Main Character Index
Pre-Stone World | Ishigami Village | Empire of Might | Others

In the year 2019, Earth's entire human (and swallow) population was petrified into stone statues under mysterious circumstances. Roughly 3,700 years later, a number of people either broke free from their petrification through sheer willpower, or were revived using Senku's de-petrification formula. These people would go on to join Senku in his quest to rebuild modern civilization.

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In General

And I Must Scream: As Senku noted, it is possible to remain fully conscious while petrified by keeping your mind really busy at all times. While this comes at the cost of unimaginable boredom, it's perhaps better than the alternative; quickly losing consciousness and the ability to break out on your own.
Brains and Brawn: The dynamic between actual genius Senku and Taiju who is constantly noted as being Dumb Muscle
Charles Atlas Superpower: A large chunk of the characters have one area of expertise that they're almost superhumanly skilled at. For instance, Senku is a genius among geniuses, while Taiju is an indefatigable Stone Wall.
Fighter, Mage, Thief: Senku (who is referred to as a "sorcerer gentleman") thinks about this trope after he first de-petrified by acknowledging that there's a limit to what his knowledge can achieve without Taiju's great strength or Yuzuriha's super dexterity.
Good Scars, Evil Scars: The crack marks on Senku, Yuzuriha, and Taiju are small and neat, in contrast with the very large cracks that often span across the faces of Tsukasa and his goons from his Empire of Might. Hyoga, the evilest of them all, has the most extensive scarring seen on a revived character. Meanwhile, the ambiguously neutral Gen has a single, moderately sized scar.
Healing Factor: When going through the de-petrification process, no matter how small the petrified body part is, all injuries are miraculously healed, including fatal injuries. Even braindead patients will wake up, fully conscious when they are de-petrified.
Improbable Age: Despite all being teenagers, most of them are extremely well-versed in at least one area of expertise or have some special skill (or several, in Senku's case) that would realistically just take several more years to master than any of them have actually lived. Senku himself, of course, is the main offender; he's probably several times more knowledgeable than any doctor or scholar could ever hope to be.
Really 700 Years Old: All of these characters are really thousands of years old, as they all were frozen for over 3,700 years before being freed. Of particular note though is Senku and Taiju, who were actually conscious the entire time and are therefore technically really, really old men still living in their teenage bodies (though they evidently still act just like they always have upon being freed).
Scars Are Forever: Those who are revived have prominent "cracks" on their bodies where the stone broke apart unevenly, as a result of thousands of years of weathering damaging the stone and causing the surface layer to flake off like dead skin. This creates quick identifiers to separate those who were de-petrified and those who were born into the Stone World (Though female characters' marks tend not to be on their faces). During the Treasure Island arc, several characters including Taiju are petrified a second time; when they're restored a few days later, the stone transforms back into flesh rather than flaking off, which also heals their previously obtained scars. After Tsukasa's second petrification and subsequent revival, Senku is the only member of the Perseus crew to keep his scars. The rest of the crew replicate their old scars using paint as a display of unity, promising to remove them together once the threat of petrification has ended. When Senku gets petrified again during the South America arc, his cracks are still there. Senku believes that it's because the erosion was preserved.
Taken for Granite: All of these characters were frozen in stone for thousands of years before being freed, whether by their own determination or through Senku's de-petrification formula. Interestingly, it seems that it's possible for people to remain conscious and eventually break free from the stone by themselves as long as they keep their minds busy (as demonstrated by Senku and Taiju); otherwise, consciousness is quickly lost and the person will have to be freed by someone else. They will also wake up completely unaware of their circumstances (as demonstrated by everyone else).

Kingdom Of Science

Senku Ishigami

Voiced by: Yūsuke Kobayashi (teen), Mikako Komatsu (child) (Japanese), Aaron Dismuke (teen), Mikaela Krantz (child) (English), Alejandro Orozco (Latin American Spanish)

"The dawn of the kingdom of Science begins..."

"The two of us high school brats are going to build a civilization out of nothing. We're going to become the Adam and Eve of this stone world."

A high school student with an intellect and well of knowledge that could rival even the modern world's greatest minds. Case in point, his dream is to go to space by making his own rocket. After being petrified, he was able to remain conscious by constantly counting the seconds for 3,700 years. His current objective is to recreate civilization in the Stone World by creating what he calls the Kingdom of Science.

Accidental Marriage: Because Chrome passes out from the injuries he sustained fighting Magma, Senku (who was planning on throwing his match to Chrome) ends up winning the village games and marrying Ruri. However, thankfully, he also became the village chief as a result of his victory... giving him the right to divorce Ruri on the spot not 5 minutes after "marrying" her. Ruri, naturally, was dumbfounded by the whole thing.
Amicably Divorced: Technically applies to him and Ruri. They were married^notefor all of roughly five minutes. They divorced. And they get along just fine^note.
And I Must Scream: Unlike many others whose consciousness faded over time after being frozen, Senku stayed awake during his entire petrification by counting the seconds starting the moment he was frozen. However, he ends up just fine after waking up.
Anime Hair: Bigger than his head even. It's especially noticeable since Dr. Stone trends more towards reasonable hairstyles than some anime. Also, it has the tips dyed.
Attractive Bent-Gender: When the gang tries to create suitable candidates to infiltrate the Head's harem of girls, Senku turns out to look surprisingly not-too-bad while disguised as a girl. Unfortunately for the sake of the mission though, his voice is too deep to be convincing.
Back from the Dead: Tsukasa actually killed Senku in chapter 10 but he was able to come back to life due to the un-petrification process healing the bodies of the petrified.
Beyond the Impossible: Not only did Senku count off the seconds for thousands of years while frozen, but was also actively thinking to himself about the situation at the same time. To get an idea of how ridiculously difficult this is, just try thinking about anything constantly for 5 minutes while also actively counting. To do that for thousands of years is some insane multi-tasking. For comparison, Taiju, who also remained conscious, had no idea and could only obsessively think about his love confession.
Born Unlucky: Whenever a situation comes down to pure luck, Senku always gets screwed, leaving him to use skill and effort to turn things around. During the Village Games, the group ended up drawing the absolute worst tournament bracket possible, and at the climax of the second arc his attempts to quickly create gunpowder are thwarted when the bat guano fails to react with the nitric acid, prompting Gen to quip that "your luck has always been crappy, hasn't it?"
Catchphrase:
- Often uses the number ten billion, for example by claiming something is 10,000,000,000% certain.
- "Not one millimeter" comes up as the negative of the above, for example, "That speech did not move me one millimeter."
- "This is exhilarating", "Get excited!" and variants is also used a lot whenever he either succeeds in his goals or a new challenge that needs science comes up.
- To a lesser extent, he's fond of saying "All of America weeps" when he's discussing matters supposedly linked to the country, like automobiles or firearms.
Celibate Hero: He's a combination of the "thinks love is a distraction" and the "socially awkward" variety. When Kohaku tells him that she's "starting to fall for him" when he first meets her, his reaction is to frown and sweat nervously before getting annoyed and quipping that "a brain in love is the most illogical variety of trouble" (Luckily for him, she didn't mean it that way, anyway). Amaryllis's great beauty and charm also do not affect him, shocking her and leaving him totally unimpressed. A few characters, such as Gen, believe that Senku is simply laser-focused on restoring the world and might be more open to pursuing romance once he's accomplished that goal, but Senku himself has neither confirmed nor denied this idea.
Character Tics:
- Early on in the story he tends to put a hand on his neck and roll his head to crack his neck joints. After Tsukasa "kills" him by breaking his neck, Taiju, and Yuzuriha figure out that he was doing this gesture (which he never did in all the time they'd known him) on purpose — to get Tsukasa to attack a place on his body that was still petrified.
- Later on he tends to pick in his ear with his pinky finger, usually to show annoyance or nonchalance towards someone.
- Whenever he is in the process of performing mental calculations, he'll raise one hand up, with the first two fingers extended, in front of his eye.
Chekhov's Skill: At the beginning of the series, Senku's skill at counting the seconds, up until his revival, is mainly used to establish how he knows how long everyone's been petrified for. However, during the battle against Ibara, it's his three-thousand-plus years of practice at counting seconds that allows Senku to perfectly time his moves against the set speed of the Medusa-device's petrification ray, enabling him to ultimately outsmart Ibara.
Childhood Friends: Formed a Two Guys and a Girl trio with Taiju and Yuzuriha up until high school. Interestingly, both he and Tsukasa believe that the four of them would've been great friends had they met Tsukasa during their childhood, with Senku imagining a What If? scenario where Tsukasa would have protected him and Taiju from bullies.
Child Prodigy: One chapter shows him reading a book about electromagnetic forces in class while the teacher is explaining basic addition.
Clean Dub Name: The Brazilian Portuguese dub managed to pronounce his name in various ways rather than "senkoo". This is because his name sounds like "sem cu" ("without an ass(hole)" in Portuguese).
Clock King: Senku was petrified into a statue in an area with no sunlight, but knew exactly the date and time he was finally freed by counting every second during the thousands of years he was stuck. As insane as that sounds, to him, it was necessary to synchronize with time so he wouldn't risk waking up and dying in the winter.
- He also has a keen sense of how long it takes people he is merely passingly familiar with to do certain things or to catch on to what he's up to, evening the odds against enemies stronger than he is.
Combat Pragmatist: Since he's got pathetic physical strength and no talent for fighting at all, he's not above hitting below the belt as a last resort means of defending himself. Just ask Ginro.
Creepy Good: Whenever Senku's plans work out, he puts on a Nightmare Face and talks to himself. This, combined with his red eyes, makes him look just like a villain. Despite this, he's a good guy through and through, who wants nothing more than to restore humanity. This is often Lampshaded by Kohaku.
Deadpan Snarker: Fitting his intelligence, Senku is very quick-witted and has a dry sense of humor; about 90% of his dialogue consists of teasing quips or playfully snarking with his friends in one way or another. Despite this, however, he is capable of being genuinely friendly... when he feels like it, and unlike many hyper-intelligent genius characters in fiction, he doesn't actually look down on people who don't match his level of intelligence, being able to find usefulness in most people.
Defeat Means Friendship: Although a common Shounen trope, the number of times Senku has caused this is staggering, considering he doesn't quite fit the typical Shounen protagonist mold (instead being an Insufferable Genius and Jerk with a Heart of Gold) and the fact that his enemy's defeats are caused through guile, cunning, science, and trusting his allies to carry out vital tasks, rather than straight-up fights.
- To date, Minister Ibara is the sole antagonist that has not joined Senku after defeat. All other characters that have opposed or tried to kill Senku before, including Magma, Tsukasa, Hyoga, Homura, Moz, Xeno, and Stanley, eventually become his allies.
Determinator: Despite his lack of physical strength and durability, Senku has tremendous mental fortitude; he was fully conscious for the entire 3,719 years that he was petrified, and he spent the entire time counting the seconds in order to keep track of time. Even more impressive, he managed to retain his sanity despite the unbelievable boredom that must have ensued.
Disappeared Dad:
- Like his dad, Byakuya was up in space during the stone explosion (and also eventually founded the village Senku now controls), he's long dead by the time Senku is freed from his petrification.
- Furthermore, with the reveal that Byakuya was only Senku's adoptive father, the status of his biological dad (and mom for that matter) is completely unknown.
Doing In the Wizard: Pretty much anytime any character references something occurring spiritually, expect Senku to give the actual scientific explanation.
Emperor Scientist: A benevolent version. He's able to get many characters and entire communities on his side just by showing them what the old world could offer with technology.
Enemy Mine: Has chosen to work with Xeno in solving the mysteries of the Petrification Event and Whyman, while Xeno waits for Stanley to rescue him.
Einstein Hair: Exaggerated to its logical extreme. Senku himself is, of course, a fan of Albert Einstein and bases some of his creations on his work. One of the cover art pages even features Senku dressed as Einstein and doing his signature tongue-poke. In chapter 93, Senku also does the pose for the first photograph taken since the petrification.
Fake-Out Make-Out: When Kohaku gets into a fight with Kirisame and realizes she's both in over her head and possibly about to blow their cover, Gen bails her out by getting her to kiss Senku and trick Kirisame into thinking she's just a lost girl looking for her boyfriend. Considering Kohaku and Senku are both Celibate Heroes though, both of them are... not particularly into it.
Family of Choice: While it was already established that they weren't blood-related, Chapter 115 reveals that Senku was apparently the child of Byakuya's best friend. He doesn't know anything beyond that, but he really doesn't care because it doesn't matter to him; he and Byakuya were father and son.
For Science!: Senku lives by this trope. Early in his childhood he was fascinated by science and technology and worked hard to master it. Once he reawakens in the stone world, he utilizes his previous education and experiments to try and bring humanity back to the technological level they were at before the world turned to stone. He has hits and misses, and we're shown not just when he succeeds, such as when he first recreates a light bulb, but also failures, such as his first attempt to melt iron filings down into an iron bar, but fails because they can't heat the forge up enough to cause it to melt. Despite those setbacks, Senku says trial and error is part of science, learning what works, and what doesn't.
Freudian Trio: The Superego (very logical and interested in rules (of science!)) to Taiju and Chrome's Id (much more emotional and given to impulses them him) and Kohaku and Yuzuhira's Ego (a balance between the two, each in their own way).
The Gadfly: Aside from his intelligence, one of Senku's defining characteristics is how much he enjoys using his knowledge to screw around with people and piss them off just for the sake of it.
Geek: Besides being scientifically minded, he's clearly a fan of video games (name-dropping Monster Hunter and Dragon Quest in specific) and anime (including Doraemon, Gundam, and Dragon Ball).
Geek Physique: He's a genius, and while he has a slim, athletic body, he's not very strong or muscular. Or at least, compared to everyone else.
Given Name Reveal: His last name is revealed in chapter 41 to be Ishigami. This is a spoiler because before that fact is revealed, we learn that the stone village he's been staying in for the past six months is called Ishigami Village.
Go Mad from the Isolation: Averted. Despite remaining fully conscious and petrified for 3,719 years, he emerges as spirited and snarky as ever. He even spends an additional 6 months alone before Taiju wakes up.
Good Is Not Soft: If you're on his side, he'll gladly treat you like a friend and occasionally even go out of his way to make something to help you specifically, such as a pair of glasses. If you're not, you're getting the brunt of his scientific advances, as Tsukasa's goons find out.
Good with Numbers: Among his many other genius moments, he was able to accurately guess Lillian Weinberg's measurements, solely from remembering a photo of her with Byakuya, whose height he knew.
Guile Hero: He's pretty much a science geek who has no chance whatsoever of defeating anyone in a physical fight. He's fully aware of this, however, and shows no hesitation in using the future humans' superstitions to manipulate them so his plans can work.
Handshake Substitute: He tends to do high fives, but there's a greater significance behind them than just saying "hello". If Senku high-fives you, it's him metaphorically tagging you in; it's his symbol that he has complete trust and faith in your abilities. A few characters like Kaseki and Suika have picked up on this and actually asked for (and received) high fives before starting on some important job.
Happily Adopted: Not related to his dad by blood, but they got along great before the petrification event separated them.
Heroic Sacrifice: Even knowing that Tsukasa will kill him once he has the revival formula, he tells it to him anyway so he can let Yuzuriha go free. Tsukasa then proceeds to strike his neck with enough force to kill him... which would have been successful had Senku not had a small, hidden piece of stone still left on his neck.
Hellbent For Leather: His clothing is made from leather he obtained by killing and skinning wild deer.
Hidden Heart of Gold: Despite his eccentric personality and ego over his intelligence, Senku does have the goal of restoring humanity and cares about Taiju and Yuzuhira. He even keeps his promise to Gen and makes him a bottle of cola. Tsukasa calls him out on this early on when threatening Yuzuriha, noting that for all of Senku's posturing, he would never let anything happen to his loved ones. And he was right.
Honey Trap: Hilariously and to everybody's immense surprise considering his usual disinterest in romance, he proves perfectly capable of charming The Mole Luna as sort of an insurance policy against Xeno's plans, breaking out the Bishie Sparkles on her and everything. Which proves to save his life when he gets shot and Luna — the only medic around — decides to treat him.
Ideal Hero: Senku doesn't fit the usual mold: He's physically weak and generally unskilled in combat. He doesn't care for gushy speeches about love or friendship or preachy moral lectures, and he isn't shy about (playfully) insulting his friends. Nevertheless, he demonstrates himself to be not only brilliant, but a heroically and uncompromisingly compassionate, courageous and determined individual. He works as hard as he can not only to help those around him and improve their lives, but to excite and inspire them with scientific wonders. He shows great bravery in the face of danger and great determination in the face of setbacks and failure. He refuses to excuse himself from tedious or dangerous work even though he could very easily justify delegating it away. He recognizes and encourages the talents he sees in others, consistently entrusting them with responsibility without doubt or suspicion. Finally, he shows forgiveness to those who have opposed him, and is willing to immediately welcome them as friends and allies without imposing any debt or guilt.
Inconsistent Spelling: Although his name is almost always spelled "Senku", the spelling "Senkuu" can be seen in some places, such as on the side of the rocket he made in his childhood.
Insufferable Genius: Subverted. Though he can brag or tease his friends at times and isn't afraid to show how much smarter he is than everyone else, he's also humble enough to recognize that everybody has value and acknowledges others have important skills that he himself does not have and it takes the help of everyone to accomplish their goals. He also regularly praises others and is always excited to see others excel or display an interest in science (such as any time Chrome comes up with a brilliant idea) and is genuinely impressed when someone like Yuzuriha, Gen, Ryusui or Kaseki show off their talents. Also, he's not much of a jerk to begin with, considering that he isn't outright mean to others, but would rather tease them or give them criticism that is true, but also encourage them to do better.
Jerk with a Heart of Gold: While he generally looks down on people due to being so much smarter, he does genuinely care about Taiju and Yuzuriha, and while he may sound like a Mad Scientist, he disproves Tsukasa of having any sort of misanthropy, with his goal having altruistic motives.
Senku: I am a technology-loving kid, who's excited by mecha, space, and Doraemon! I will save all of humanity, without exception, with the power of science!
- There's also the fact that when he makes glass, he decides the first thing he'll do with it is make Suika glasses.
- As exemplified by the quote, despite his superiority complex, Senku's long term goal is to restore humanity from stone.
- He may tease Taiju a lot, but it's clear that Senku has absolute faith in his friend. The gasoline "love potion" prank may seem extreme, but afterwards Senku explains that he only offered it because he knew Taiju was too honest and noble to even consider using such a thing. He also believed that Taiju's confession would succeed (when everyone else thought he'd get shot down), and knew that Taiju would be able to overcome the petrification because his pride as a man wouldn't let him accept his confession being interrupted.
- Despite somewhat cruelly mocking Chrome because it was likely Ruri would end up marrying Kinro or Ginro, Senku does help him win his fight in the tournament when the time comes. Furthermore, when he actually ends up winning the tournament and marrying Ruri, he immediately finds a reason to divorce her rather than try to take advantage of the situation (it helps that he's a Celibate Hero, though).
- When trying to win over the trust of Ishigami village, Kohaku frequently remarks how he sounds like an evil villain out for conquest when he talks about it, despite it ultimately being beneficial for everyone involved.
- There's also the simple fact that he's the World's Smartest Man without being an Insufferable Genius (except for brief comedy beats). Quite the opposite, Senku recognizes that progress takes all kinds of people and readily acknowledges those who possess skills he lacks, praising Kaseki as a master artisan, nicknaming Suika "Great Detective" for her investigative skills, and entrusting Yuzuriha with the secret mission to fix the statues Tsukasa and his people broke because he respects her precision and skill with handicrafts.
Late-Arrival Spoiler: His surname, a major reveal near the end of Part 1, is used frequently in promotional material from then on.
Lethal Chef: Zig-Zagged. He knows how to cook, but due to lack of experience and the quality of the ingredients at hand, Senku's more complex dishes like ramen and bread tend to taste horrible to anyone but the villagers of Ishigami Village. At one point, his cooking is literally likened to a Fate Worse than Death, with starvation due to people refusing to eat his cooking being presented as an actual threat, convincing the modern-timers that having a Supreme Chef on board is a vital necessity rather than a luxury. However, his attempts at making sweets like cotton candy and vanilla ice cream are far more successful and are loved even by the modern-timers.
Mad Scientist: Definitely has shades of being one at least, as he tends to take great joy out of using people like guinea pigs for his experiments and he can put on some pretty twisted facial expressions when something scientific intrigues him (as Kohaku often notes). However, it's ultimately Subverted because, despite his trolling nature, he's ultimately got a good heart and has no real interest in using his science to hurt people.
MacGyvering:
- He has a knack for building crazy things on the fly to help him out in tough spots, such as a cart contraption to make transporting himself and Kohaku to her village easier.
- He defeats Ginro in the village games by balancing his staff on Suika's mask to create an impromptu simple-lever machine, delivering one hell of a Groin Attack by stepping on it at just the right time.
Magnetic Hero: A unique variation, but one nonetheless. Despite being an Insufferable Genius and Jerk with a Heart of Gold with little if any social and emotional tact, his scientific expertise, recreation of creature comforts from technology, and very genuine desire to restore civilization and save EVERY single human (unlike Tsukasa) causes multitudes of people to flock to his cause, and even persuades many initial adversaries to join him.
Manly Tears: He briefly sheds tears at his father's grave before recomposing himself and returning to the village.
Master of All: If there is a subject of science he hasn't displayed expertise at, then Senku has simply never gotten the chance to display it.
Meaningful Name: His surname, Ishigami, means 'stone god'.
Mischievous Body Language: Senku has a specific grin with his eyes shaped like crescents and oftentimes a devilish tongue to go with it when he's blatantly doing something mischievous, sketchy, or potentially unethical.
Missing Mom: Back in 2019, his dad only mentioned Senku when Lilian asked him about his family, and Senku's mom has not been seen in any flashbacks. Of course, since Senku and Byakuya aren't blood-related, it's possible Byakuya never married and raised Senku by himself.
Not So Stoic: He may be intelligent and science-minded, but he still has some classic Shonen Jump traits like absolute faith in his friends and an understanding of Pride^noteHe figured that Taiju would be able to "wake up" from petrification because his "pride as a man" would never let him tolerate being interrupted in the middle of a serious Love Confession. Tsukasa calls it his weakness since he can't be truly objective and logical when his friends' lives are on the line.
- When he and Chrome go to get sulfuric acid, Chrome notices that Senku's hands are shaking, indicating he's just as terrified as Chrome is.
- He can barely hold back Tears of Joy alongside Taiju and Yuzuriha when he hears them on the phone after spending a year apart from them and openly states how much he missed them.
Omnidisciplinary Scientist: Senku is not only an accomplished engineer, physicist, and chemist, since he's been building rockets on his own since childhood, but is also knowledgeable in geology, biology, and of course mathematics. At this point, there's no telling what other areas he has mastery over.
One-Man Industrial Revolution: The central plot revolves around Senku, using his vast scientific knowledge, attempting to drag the current stone age world kicking and screaming back into the modern era level of technological advancement. So far, he is handily winning this struggle.
Our Hero Is Dead: Briefly suffers this early on when Tsukasa seemingly delivers a fatal blow to his neck. It turns out a few chapters later he had a plan to come back to life.
Plot Allergy: Senkuu is very allergic to lacquer, as shown during the first season, to the point his face gets alarmingly swollen. Several chapters later, Senkuu takes advantage of this to win the poker game against Ryusui and Gen, by using his skin to look for the cards marked with lacquer.
The Pollyanna: While he isn't as energetic and outwardly positive as this trope implies, Senku utterly refuses to let anything disrupt his optimism regarding what's possible for him to reinvent and the resurrection of all of humanity.
Pretty Boy: He's canonically considered quite attractive In-Universe by many women; even Kohaku has to admit that he has the look of a "lady killer". Befitting his genius, he quickly uses his looks to his advantage against the American Science Kingdom spy Luna, uncharacteristically turning up the charm on her when he senses her Single Woman Seeks Good Man tendencies.
Really 700 Years Old: Senku is around ~3,737 years old, having spent 3,719 years fully conscious during his petrification and counting the seconds. Despite this, his body didn't age a day and he more or less still acts like a teenager (or at least, you know, how a teenager with a genius-level IQ would act). Lampshaded when he makes wine: Taiju tells him that teenagers shouldn't drink, and Senku replies that since he's over 3700 years old, he's technically an adult by now.
Reused Character Design: Senku looks like a miniature version of Ken, hell, even when he's drawn as an adult◊, or with a suit◊ he looks even more like him.
Science Hero: While he may come off as an egotistical jerk, he really does want to restore as much of humanity's science as he can, and create a kingdom for science. To do so, he mostly uses his knowledge to create tools that will help him and his allies.
Sharp-Dressed Man: While the Stone World has forced him into wearing simpler clothing, the What If? cover art (which features the village characters and Senku in the past) shows that his natural fashion sense leans towards sharp suits. And thanks to Yuziriha's skills as a tailor, he eventually gets the option to dress up once again, choosing a dapper suit when he plays Ryusei in their ship's casino for example.
Signature Laugh: Kukuku
Slasher Smile: He flashes a few of these throughout the series.
Squishy Wizard: Teen Genius he may be, with enough scientific knowledge to potentially restore civilization, but compared to just about everyone around him, his physical abilities are practically nonexistent.
Stock Shōnen Hero: Senku is an inversion of this trope. While other characters who fit this mold are rather Book Dumb and make up for that shortcoming with their incredible power and strength, Senku is the polar opposite—highly intelligent, yet also the weakest character in the cast.
Team Spirit: Senku very strongly affirms that none of his goals and achievements would be possible without the strengths, abilities, and contributions of his friends, and that he needs them just as much as they need him. Even in battle, his victories against his enemies are only achieved due to very direct assistance from his comrades.
Teen Genius: As a former Child Prodigy, he was naturally just as brainy during his high-school years. Even today, he's most likely still a teenager; assuming he was frozen at 15 or 16 (it was revealed that the stone incident happened 5 years after his 5th-grade year), he should currently be about 17 or 18 (technically, at least).
Thanatos Gambit: He anticipated Tsukasa's Face–Heel Turn and started performing a Character Tic that drew attention to his neck; when Tsukasa attempted to give him a quick and painless death he struck that precise spot. After getting away Taiju and Yuzuriha discover a tiny patch of petrified skin at the base of Senku's neck and figure out that he was specifically baiting Tsukasa to strike him in that spot because they could use the secondary healing aspect of the de-petrification process to bring him back to life, which would buy them some (but not much) breathing room while Tsukasa still believed him dead.
This Is My Boomstick: Senku uses his knowledge of chemistry and modern technology to impress the people from Kohaku's village, but never pretends it's magic, and explains to anyone who will listen (mostly just Chrome) exactly how these things work. He coats Kinro's speartip with a gold compound and wins over more villagers to his side with the food of the gods: ramen. When Hyoga attacks, he actually does bluff his way out using a "boomstick" — he uses an iron tube, some gunpowder, and a thrown rock to trick them into thinking he has a gun.
Tranquil Fury: It isn't often that Senku loses his cool, but when he does, something very bad has happened or something even he couldn't factor in has occurred. He never shouts or uses violence, but his face will say it all. The biggest example so far is when the core members of the Kingdom of Science are petrified, it is only for a brief moment, but his rage and determination to undo it is plain as day.
Troll: Senku really likes screwing around with his friends. A stand-out example, though, would be when he rubs it in Chrome's face that his crush Ruri is probably going to end up marrying Kinro or Ginro due to their village's customs.
Tsundere: He's a lesser example of a Harsh type, tending to put on a tough-guy act and say things like "I invented this to help myself, any benefit you get is secondary". However, he's also very open about how much science improves peoples' lives, and the affection he has for the villagers makes it clear that he isn't nearly as harsh as he sounds.
Two Guys and a Girl: Has formed a trio like this with Taiju and Yuzuriha for most of his life, including the events of the first arc in the manga. He also quickly forms one with Chrome and Kohaku after meeting them.
Vitriolic Best Buds: With Gen. The two viciously banter often, but it's clear they greatly value each other's friendship and respective abilities, and trust each other greatly in difficult situations.
Weak, but Skilled: Not only does Senku have no fighting or hunting capabilities like Taiju, but he also lacks physical strength and endurance.^note However, Senku is possibly one of the smartest and most educated people on the planet, and he's definitely the smartest person left in the Stone World. As such, despite his lack of physical power, he's the only one left in the world capable of kickstarting the recreation of civilization. Tsukasa knows this, which is why he's far more concerned about Senku rather than Taiju.
Wholesome Crossdresser: When Amarillys gives all the guys a makeover to see who would infiltrate the harem with Kohaku and her, Senku looks very nice with makeup on and his hair tied in two pigtails, but his voice is too deep. He rejects this 1 billion percent.
Will Not Tell a Lie: According to him "Science doesn't lie", and neither does he when it comes to science, even in situations where doing so would benefit him. Early on, when Tsukasa holds Yuzuriha hostage and demands to know the formula for the "miracle water", Senku complies rather than giving him a false formula just to save his friend. When they're trying to sway Nikki to their side, she asks if they can bring back Lillian Weinberg's music; Gen encourages him to lie and say yes, but Senku admits that all music storage media from their time have long since crumbled into dust. It also works the other way around: he won't lie to give someone false hope, meaning if he says it's possible to save someone's life he really means it, as seen with both telling Tsukasa that de-petrifying his sister Mirai might restore her from clinical brain death, and later telling Mirai that they can use the "stone beam" to save Tsukasa from the mortal wound Hyoga inflicted upon him.
Wise Beyond Their Years: While his great intelligence is often pointed out, what's equally noteworthy is that Senku is rather calm, patient, and sagely whenever he needs to be. Some good examples would be his various speeches to Chrome about what it means to carry on the will of science in the event of his (Senku's) death.
World's Smartest Man: Genius Bruiser Tsukasa has called him the smartest person he has ever met. The unparalleled expertise he's displayed in various fields of science without modern technology to aid him only supports this status. After he awakens after 3700 years, he immediately starts using his vast scientific knowledge to re-discover everything from metalworking, agriculture, and sailing to telephones, radar, and even soda pop, all while trying to find a way to undo the petrification process and save humanity.
Xanatos Speed Chess: He is a master at analyzing tough and even impossible situations, and coming up with solutions and strategies on the spot. Which is fortunate because, due to his Born Unlucky status, his long-term plans never turn out the way he intended.
- During the climax of the Stone Wars arc when all seems lost Senku is able to make nitroglycerin and force Tsukasa's forces to surrender
- In Chapter 127 he is able to properly deduce through pure logic that Kirisame is throwing a fake petrification weapon, and to order an emergency evacuation fast enough for it to be effective with no casualties. Not only that, but he later uses Magma's betrayal and him going full Leeroy Jenkins to his advantage in order to turn the situation around.
  Senku: It's when your back is against the wall that your chance truly comes, right?
- In Chapter 135, he's able to use a line of his allies willingly letting themselves be petrified to calculate the exact moment to toss a jar of revival fluid into the air so it lands on him and immediately depetrifies him. This is an on-the-fly plan implemented in a matter of seconds.

Taiju Oki

Voiced by: Makoto Furukawa (teen), Mutsumi Tamura (child) (Japanese), Ricco Fajardo (teen), Emily Fajardo (child) (English), Miguel Ángel Ruiz (teen), Diego Becerril (child, Episode 4) (Latin American Spanish)

"I'll leave the thinking to you, Senku! So rely on me for the physical parts!"

Senku's best friend. Though nowhere near as intelligent as him, he makes up for it with his strength and endurance and is fiercely loyal.

Anchored Ship: Him and Yuzuriha. Despite obviously liking each other, Taiju decides not to ask her out because they're basically the last people on Earth and he doesn't want to make her feel like she has no other choice.
And I Must Scream: Unlike many others whose consciousness faded over time after being frozen, Taiju stayed awake during his entire petrification by thinking about Yuzuriha. However, he ends up just fine after waking up.
Badass Pacifist:
- Despite his massive strength and endurance, he refuses to fight anyone because he doesn't want to hurt people.
- This is later Played for Laughs, when he first fights Tsukasa, where he declares that he won't fight back, but will allow Tsukasa to keep hitting him as long as he stops breaking statues; however, the sheer lack of logic only confuses Tsukasa.
The Big Guy: Of Senku's crew. Taiju's physical capabilities are roughly on par with Tsukasa's, given that the latter considered him a serious threat if angered, and though he lacks any will or ability to fight, his toughness and endurance are so absurd he even shocks the stone world inhabitants.
Book Dumb: Taiju's never going to be a scientist or a scholar, he just simply does not get concepts and theories. But he's aware of his own shortcomings, and not only does he have a decent track record with finding "mundane" solutions that he can perform without science, but he also tends to remember things Senku says that he can understand. Taiju might not get why something works, but he can still act on the knowledge that it does. For example, he ends up having the most successful wheat field, simply because he remembered a conversation he and Senku had years earlier, where Senku offhandedly mentions that crushed seashells can improve soil quality^note.
The Bus Came Back: At the beginning of the Stone World War arc, he and Yuzuriha return to help Senku fight for the Cave of Miracles.
Call to Agriculture: When Ishigami Village starts growing their own wheat, Taiju takes to it like a fish to water — not just because of his bottomless stamina, but because that kind of straightforward, honest work fits his personality perfectly and because it's the best way he can help rebuild humanity by ensuring that there's enough food to go around.
Cannot Spit It Out:
- He spent all of his childhood and most of his teenage years being unable to tell Yuzuriha how he felt. Then, at the very moment, he was finally about to confess, the stone explosion happened and he was petrified. It was his resolve to tell her how he felt, in fact, that kept him conscious for thousands of years until he eventually broke free.
- After finally reuniting with Yuzuriha, however, he's now decided that he won't ask her out because they're basically the last few people on the planet and he doesn't want to make her feel like she should be obligated to say yes.
Charles Atlas Superpower: Crossed into this territory around chapter 11, when he takes this◊ huge rock and throws it a good 6 meters or so directly up into the air. Not even the finest shot-put athletes in real life could do that. His ridiculous strength and endurance combined with Senku's scientific knowledge allowed the two to quickly advance past the stone age on their own, where Senku by himself simply lacked the manpower to do so.
Childhood Friends: With Senku and Yuzuriha, and he eventually fell in love with the latter.
Crouching Moron, Hidden Badass: While he is not an outright moron, he is pretty Book Dumb, especially when compared to Senku, and he is also quite naive. Despite his lack of intelligence, he can prove to be resourceful in his own way when push comes to shove.
Decoy Protagonist: The first chapter is told almost entirely from Taiju's perspective. Afterwards, however, he becomes the group muscle while Senku establishes himself as the protagonist.
Deep Cover Agent: Senku asks him and Yuzuriha to go undercover in the Tsukasa Empire. Played with in that Tsukasa knows who they are and that they're not loyal to him, but he still allows them enough freedom for Senku's plan to work.
Determinator: If there's one thing he and Senku share in common, it's their determination. Like Senku, he stayed conscious during the entire 3,719 years he was frozen via thinking of his love for Yuzuriha. He also survives a blow from Tsukasa without any long-lasting effects.
Dumb Muscle: Frequently pointed out by both himself and Senku, he has ridiculous strength, but is as dumb as a stump about most things.
Easily Impressed: Pretty much every science-thing Senku does amazes him to no end, even simple things like using sea salt for food seasoning. Typically, this elicits either appreciation or snarky gloating from Senku (emphasis on the latter).
Go Mad from the Isolation: Again, Averted, like Senku. Despite being fully awake for almost 4,000 years and unable to move or interact with anybody, Taiju's mental state remains fine after finally freeing himself.
Heroic Build: In contrast to Senku's wiry build, Taiju is built like a tank of solid muscle. He's perhaps only beaten in this aspect by Tsukasa.
Hot-Blooded: He definitely does the most shouting and he's extremely passionate about his faith in Senku.
Inelegant Blubbering: Taiju is prone to this at emotional moments. When he and Yuzuriha finally speak to Senku over the cell phone 50 chapters and one year after parting ways, he's only able to get out an incoherent "SENKU! I... I'm... SENKUUU!", to which Senku responds, "You're not Senku. I'm Senku, dammit."
Kindhearted Simpleton: He's thick as a brick, but has a huge heart.
Large Ham: While there are occasional situations where he can be calm and collected, around 90% of the time his voice is full of enthusiasm and volume.
Locked Out of the Loop: Senku deliberately keeps most of the details of their plan a secret from him, in case he's interrogated or lets something slip. Looks like he learned from Taiju accidentally telling Tsukasa about the miracle water.
Made of Iron: The only person to ever take a hit from Tsukasa and stay standing.
Nerves of Steel: Surprisingly, despite being very emotional and expressive, Taiju has great control over his anger; even when Tsukasa directly threatens Senku and Yuzuriha, he never loses his cool or composure. This shocks even Tsukasa, who was fully expecting Taiju's wrath after he "killed" Senku.
Nice Guy: One of the kindest characters in the series, he can even put up with Senku.
No Indoor Voice: His default volume is shouting, especially when he's motivated about something. Weaponized twice; once as a replacement for the explosive in Senku's sound cannon, and again to scream to the Petrification Kingdom that their village head was a stone statue.
Pre-Mortem One-Liner: Subverted. He says "farewell, Tsukasa" before seemingly engulfing him in a huge black gunpowder explosion, but as Tsukasa quickly puts together, he actually had no intention of hurting him; he knew that Tsukasa would survive and he actually just meant "farewell" in a benign sense.
Put on a Bus: At the beginning of the Stone World: Origin arc, he leaves with Yuzuriha to keep an eye on Tsukasa. They both return when the Stone Wars arc begins.
Really 700 Years Old: Taiju is around ~3,739 years old, having spent most of the last 3,721 years fully conscious during his petrification by thinking of his resolve to declare his love to Yuzuriha. Despite this, his body didn't age a day and he more or less still acts like a teenager.
The Reliable One: Taiju may be Book Dumb, but he has the endurance and the patience to work literally all day long on whatever Senku needs him to, even if he himself doesn't understand what he's working towards. Also, despite being a very emotional guy, he showcases a lot of self-restraint and emotional control when it comes to enacting Senku's plans. On top of all this, his trust in and fondness for Senku allow Taiju to follow his lead and understand his orders on the fly with even the barest of hints. Anytime Senku needs to rely on Taiju to get the job done, his faith is rewarded simply because Taiju is a nice guy who trusts Senku. All in all, Senku couldn't ask for a better friend.
Stone Wall: Taiju can take a beating easily, but he has no skill in fighting or even the capacity to hit another human being. His solution to dealing with Tsukasa was to allow him to "beat him as much as he wanted" if it meant he would stop killing statues. Tsukasa, being The Spock, is simply confused as he can't see the logic behind that. Tsukasa later realizes that if Taiju wanted to, he could probably fight on par with him, but Taiju simply won't because he's a Badass Pacifist.
Two Guys and a Girl: Has formed a trio like this with Senku and Yuzuriha for most of his life, though he's been in love with the latter since elementary school.
Undying Loyalty: Taiju completely entrusts his life to Senku, and would gladly give up his own life if it means saving Senku's. Same goes for Yuzuriha.
Unskilled, but Strong: Taiju has none of the scientific knowledge necessary to help recreate civilization and he has no skill at all in fighting or hunting, but he's as strong as an ox and his body is built like a tank. As such, he's most useful in handling the demanding physical labor that Senku and Yuzuriha can't do. Furthermore, despite his lack of fighting skill and killing intent, his durability and strength are possibly comparable to Tsukasa himself. As such, while Tsukasa is more worried about Senku than Taiju, he does admit that it would be dangerous if Taiju were to lose control and come at him with full-force.

Yuzuriha Ogawa

Voiced by: Kana Ichinose (Japanese), Brittany Lauda (English), Jessica Angeles (Latin American Spanish)

"It feels like I must be here... because you saved me... didn't you, Taiju? Thank you..."

The Childhood Friend of both Senku and Taiju and the girl Taiju loves. She is revived soon after Taiju and Tsukasa.

Beauty Is Never Tarnished: Yuzuriha's mark is on her shoulder, rather than her face.
Boring, but Practical: Her exceptional textile abilities don't initially seem as impressive as Senku's vast intellect, Taiju's inhuman strength, Gen's impressive mentalism, etc. But it's undeniable that cloth making is one of the cornerstones for the development of humanity, which means that Yuzu is a massive help for the making of different inventions.
The Bus Came Back: Alongside Taiju, she reappears at the start of the Stone World War arc.
Character Catch Phrase: She tends to say "Wow", even when not surprised.
Deep Cover Agent: Senku asks her and Taiju to go undercover in the Tsukasa Empire. Played with in that Tsukasa knows who they are and that they're not loyal to him, but he still allows them enough freedom for Senku's plan to work.
Determinator: Every statue that Tsukasa and his minions break, Yuzuriha painstakingly reassembles them piece-by-piece in secret, often from fragments smaller than tennis balls. She won't let a single one of Tsukasa's victims actually die if there's even the slightest chance she can save them.
The Fashionista: Her lifelong dream before the apocalypse was being a Fashion Designer. When Senku and Gen offer her the chance to launch her own Fashion Line with the rest of fabrics, she puts all her energy into crafting a whole collection, which even includes a full three-piece suit for Kaseki. And all of that was made with hemp.
Girl Next Door: The kind girl who Taiju knew since childhood and eventually fell in love with.
Hartman Hips: As is usual with the Boichi's tastes. She's the first major female character in the series, so naturally, it's her hips that get all the attention before any other girls show up.
Hidden Depths: Chapter 102 shows that not only can she endure Senku's multi-hour scientific lectures, but she actually enjoys them and can keep up with the science fairly well.
Masculine Lines, Feminine Curves: Invoked. Her own marks look like swirls, as opposed to Senku and Taiju's marks that look like lightning bolts.
Mundane Made Awesome: Her talent for arts and crafts is such that, with the limited tools available to her, she can sew together multiple sets of clothes in a matter of seconds, looking like Kenshiro from Fist of the North Star all the while. What makes this even more awesome is that the sewing is just a feint. She pretends to need all night in order to make the clothes and uses the rest of her time piecing together the statues that Tsukasa and his soldiers have been shattering.
Nerves of Steel: When Tsukasa holds her hostage, he cuts her long hair to intimidate Senku into giving up the revival fluid recipe. Yuzuriha responds by claiming he did her a favor, redirects his stone blade at her own neck, and makes it clear she's willing to die if it means Senku won't have to tell him anything. Fortunately, Senku has other plans...
- Also exemplified in another fashion when she pieces together the statues Tsukasa destroyed. Reviving a shattered statue requires there to be no missing internal pieces and no pieces out of place, and Tsukasa breaks statues down into gravel. Yuzuriha even admits that this task is grueling, but all of the statues she puts together were revived, showcasing her incredible willpower and concentration.
Nice Girl: She's a sweet, kindhearted, and empathetic young woman, certainly part of the reason Taiju fell in love with her. On the day of the stone incident, she even tried to take a petrified bird to the veterinarian before school (as did Taiju separately).
Not So Above It All: She gets ridiculously◊ fired up when it comes to crafting projects, as seen when Senku asks her and Kaseki to make a 3D model of the Earth for one of his plans and they go completely overboard.
Plucky Girl: After being un-petrified, she reacts to the new world fairly well, offering to help Senku and Taiju however she can.
Put on a Bus: Along with Taiju, she leaves at the beginning of the Stone World: Origin arc to keep an eye on Tsukasa.
Serious Business: Sewing and craftwork. When she gets fired up, she could practically match◊ Kenshiro's Hokuto Hyakuretsu Ken.
Signature Headgear: She never takes off her headband. Which somehow survived for 3700 years while all other clothing rotted away.
Textile Work Is Feminine: Was a member of the handicrafts club prior to petrification.
Will They or Won't They?: With Taiju. She mostly reciprocates his affections but given the premises, Taiju doesn't want her to feel any obligation to accept. They get together in the final chapter.
Women Are Wiser: She is very calm, collected and can catch on with any plan from Senku, which is why they decide that only Yuzuriha knows the details and Taiju knows the least possible.

Gen Asagiri

Voiced by: Kengo Kawanishi (Japanese), Brandon McInnis (English), Brandon Santini (Latin American Spanish)

"No matter which one of you falls, I'll be riding the winning horse."

"I've got no policies, morals, or hangs-ups at all! The world's most silver-tongued man!"

A well-known stage magician prior to the petrification event, the 19-year-old Gen Asagiri was initially revived by Tsukasa Shishio as part of his Empire of Might, but soon defected to Senku's Kingdom of Science. Gen's abilities as a self-styled mentalist and aptitude for lying make him a highly valuable asset in the Stone World.

Adaptation Dye-Job: The lighter end of his hair has gone from gold in official artwork to white in the anime.
All Men Are Perverts: During his introduction, he somehow manages to creepily hit on Kohaku in the middle of being threatened with having his throat slit (by her, no less). He later goes on to say that all he really wants out of Tsukasa and Senku's conflict is to find a cozy place to stay and cute girls to keep him company. Subverted after joining the Kingdom Of Science where he never thought about the idea of getting harem again and didn't flirt with any girls.
Ambiguously Gay: While Gen is introduced as a Covert Pervert, he doesn't appear to be attracted to any girls after betraying Tsukasa but has a significant number of moments with Senku that could be construed as Ship Tease, including confessing to Senku that he liked him longer than he thought after organizing the Ishigami Village to give him a telescope as a birthday gift. He is also incredibly flamboyant even liking to cross-dress and in a summer merchandise he has a rainbow colored towel.
Attractive Bent-Gender: When the gang tries to create suitable candidates to infiltrate the Head's harem of girls, Gen proves to look really convincing as a girl and can even change his voice to match the part. Unfortunately for the sake of the mission though, he's apparently too tall to make a fully convincing girl.
Astonishingly Appropriate Appearance: His scar is abstractly mouth-shaped. On certain zoom-ins on his face, it becomes noticeably spikier, like it's baring fangs.
Audience Surrogate: Since Gen is the only human from the modern world around Senku for the first half of the series, he regularly comments and lampshades the craziness of Senku's technological advancements, since nobody else understands what he's talking about.
Big Damn Heroes: He recovers from his injuries in the nick of time and distracts Magma long enough for Chrome's plan to work.
Birds of a Feather: Once he joins Senku's Kingdom of Science, the two of them get along like a house on fire, often exhibiting similar mannerisms and sharing a love of trolling their friends. Senku is always quick to catch onto Gen's schemes, and often assists in their execution.
Bunny-Ears Lawyer: He's lazy, self-absorbed, and a playboy, as well as a willing turncoat if it secures his own comfort. However, he is at his core a genuine magician and mentalist, both skills being used to distract and manipulate people on levels that have even saved other characters' lives.
Celebrity Survivor: Like Tsukasa, he was famous in Japan before the Stone World, being a well-known magician and author.
Chekhov's Gunman: Appeared on the cover of his book, "Magic Psychology", in a flashback in chapter 12. He would properly debut on chapter 23 as Tsukasa's spy, and someone Senku would have to convince to join his side.
The Chew Toy: Whenever hard or tedious labor is required for one of Senku's invention, it's typically Gen who gets roped into doing it.
Consummate Liar: His defining trait; he's a self-described "mentalist" (more of a showman/magician as Senku puts it) with a good understanding of human nature, and so he's easily able to trick people and sway things to his favor with his words. He's not called the "silver-tongued man" for nothing, after all. In chapter 151, it is shown that not even a polygraph machine can detect his lies, although Dr. Xeno still becomes suspicious because of how honest he's being.
Cowardly Lion: A non-combative subversion. He generally avoids danger and is overly cautious not to get caught up in a situation that would immediately put his life at risk, but he still goes into a Battle of Wits with Moz in order to make a deal with him and prevent him from going full Blood Knight on the entirety of Senku's party. He seems cool and collected while doing so, but his subsequent reaction once Senku's party is out of harm's way, reveals that he is very much this trope. He still didn't get to throw a single punch, but what he managed to achieve require guts.
Crazy-Prepared: Apparently, he walks around with protective padding and packets of animal blood under his clothes in the event of a surprise attack. And, sure enough, this allows him to survive an assassination attempt by Magma.
Creepy Good: Dude can't even plan a birthday party for a friend without going into some kind of "Evil Planning Mode," complete with Nightmare Face.
Duality Motif: Gen's black and white hair highlights his morality of an Opportunistic Bastard and uncertain loyalty during his introduction.
Early-Bird Cameo: His face appears on a book of his before his formal debut.
Faking the Dead: He plays dead after being stabbed several times by Magma, having survived through the various cushioning on his body and selling it through packets full of animal blood.
Flower Motifs: He's heavily associated with nightshade, which means "liar" in flower language. He proclaims it's his favorite plant.
Foil: To Senku. Both are from the modern era and were considered "geniuses", except Senku's was in a more straightforward field while Gen was a master in psychology. Senku is very blunt with people but is genuinely well-intentioned, while Gen is a skilled manipulator and is easily swayed through appealing to personal comfort. Senku is also Brutal Honesty while Gen is a Consummate Liar.
Good Is Not Soft: Like Senku, he isn't afraid of using his field of expertise against people he's against, as seen as when he sabotages Magma and Hyoga early on. However, those on his good side get his utmost respect, Senku, in particular, being gifted a telescope on his birthday out of Gen's own kindness.
Good with Numbers: He was able to figure out Senku's birthday solely from Senku telling him how many days he'd been alive, and knowing the date from what Senku wrote on a tree. And he does this all in his head, since he figures it out before Senku, Chrome, and Magma leave for the cave.
Guile Hero: Gen has profound knowledge of human psychology, which lets him read and manipulate other people with ease. Once he pulls a Heel–Face Turn to the Kingdom of Science's side, he takes upon this role, contrasting the Science Hero Senku.
Heel–Face Turn: Ends up loyal to Senku and lying to Tsukasa about his survival when promised some soda.
Hidden Depths: He was smart enough to figure out Senku's birthday, based on only two pieces of evidence: the date of his revival (which he carved into a tree) and a single conversation where he casually mentioned how many days old he was.
Indispensable Scoundrel: He's a noted magician and mentalist, so his skills at sleight of hand, human psychology, manipulation, and lying put him in a unique position where he could comfortably thrive in either Senku's "Kingdom of Science" or Tsukasa's Empire. Things like "loyalty" or "ethics" are less important to him than his own comfort, so it's more a matter of which side offers the better deal for his services. While the latter revived him, Senku is able to sway Gen to his side, both to deny Tsukasa the information Gen was sent for and so Senku has another person who can actually understand his goals and (some) science talk. Even when he's acting for Senku's benefit it can be easy to doubt his intentions.
The Lancer: Like Chrome, he's relatively on-par with Senku and becomes his left-hand man and commentator over the scientist's antics.
Locked into Strangeness: Back in 2019 his hair was all black (as seen on a magazine cover), but after being revived from petrification it's gone half-black and half-white.
Meaningful Name: The "Gen" in his name means "illusion", while the "Asa" means "frivolous" or "superficial"
Mundane Utility: He was a stage magician and mentalist in the old world. In the new world, he frequently applies his skills in the latter to ensure that Senku's Kingdom of Science runs smoothly, using his skills to induce cooperation, cultivate enthusiasm, and conduct negotiations. Because of this, he soon becomes an essential element in the smooth running of several of Senku's schemes.
Nerves of Steel: As noted by Kohaku, he's visibly not nervous at all when being threatened with spears, despite claiming otherwise. This is probably because he has all sorts of cushioning on his body that allow him to survive in the event of a stabbing. And possibly due to his confidence in his ability to manipulate people.
Obfuscating Stupidity: He's shown to fire back and forth between his true colors as a deadpan manipulator to a ditzy airhead.
Opportunistic Bastard: Although he works for Tsukasa, he's not shy about letting Senku know that he'll change sides if Senku's kingdom of science seems more appealing. True to his word, he was impressed after seeing the creation of an electric lightbulb, but fully joins Senku's side once he was promised he would receive some delicious Cola.
Pig Latin: The Viz translation and the English dub give him this as a quirk in his speech.
The Mole:
- Takes on this role after deciding to side with Senku's kingdom of science, pretending to be loyal to Tsukasa while undermining his forces from within. His deception is exposed when he sabotages Hyoga's weapon.
- He once again plays this role in America, infiltrating Dr. Xeno's base to gain information about the enemy.
The Social Expert: He once wrote a psychology book, and uses this knowledge to manipulate people.
Stage Magician: What he was famous for before the Stone World. Nowadays though, he actively takes advantage of his skills to trick the primitive villagers into thinking that he really is a sorcerer.
Straight Man: Acts as this whenever Senku proposes a seemingly impossible contraption to build, like a telephone or a car, since he's usually the only other de-stoned person around to know how ridiculous those ideas sound.
Token Evil Teammate: Downplayed. While not outright malicious, whenever Senku is facing an obstacle that requires less than ethical means to solve, Gen can usually be expected to back it if he didn't suggest it to Senku himself.
Trademark Favorite Food: He betrays Tsukasa and joins Senku in exchange for a bottle of Cola.
Verbal Tic: He swaps the syllables of certain words, for instance saying "doihi" instead of "hidoi" (which means mean, harsh, or terrible). The Viz translation and the English dub approximate this with Pig Latin.
Vitriolic Best Buds: With Senku. The two viciously banter often, but it's clear they greatly value each other's friendship and respective abilities, and trust each other greatly in difficult situations.
Voice Changeling: Gen is very talented at imitating voices. His Tsukasa impression appears to unnerve even Kohaku, and he can even do a woman's voice, like when he imitates Lillian Weinberg as part of a plan to pacify the Tsukasa Empire's army.
The Watson: He is usually the one listening to Senku about the scientific bases of his new gadgets.
Wholesome Crossdresser: When Amarillys gives all the guys a makeover to see who would infiltrate the harem with Kohaku and her, Gen makes a very convincing woman, but he is too tall to pass for an average cute girl.

Ryusui Nanami

Voiced by: Ryōta Suzuki (Japanese), Clifford Chapin (English), Óscar Flores (Latin American Spanish)

"You know what I mean, Senku. You know what I neeed!!"

Heir to the now extinct Nanami conglomerate and director of ocean-based Nanami school, de-petrified by Senku for his unrivaled captaining skills.

All-Loving Hero: Ryusui loves everyone, even those who dislike him such as Minami.
Ambition Is Evil: Inverted in that Ryusui is very greedy, but generally his greed means that he pushes for further developments that help everyone. His butler Francois deeply respects his ambition as he's willing to put in the work to get what he wants.
Bunny-Ears Lawyer: He was a globe-trotting playboy and an exceptional sailor by his mid-teens. Nikki summarizes the trope rather effectively by describing him as "over-the-top but incredibly talented". As Senku puts it when unilaterally deciding to revive him over a mild-mannered teacher, "Of course we're prioritizing skill over personality".
But Not Too Bi: Ryusui mentions that he's into both men and women, and in side material, it is mentioned he's had boyfriends in the past, but the story mostly only shows his love for women.
Character Catchphrase: "I am the greediest man in the world!" He also tends to ask "Am I wrong?" after making a declaration
Character Tics: Constantly snapping his fingers.
Chivalrous Pervert: He has a thing for beautiful women, but he considers all women beautiful and does everything he can to ensure their happiness, including getting stable food supplies for Ishigami Village so they'll never have to lose family to famine again.
Cruel to Be Kind: When he discovers that Suika stowed away on the science vessel Perseus, Ryusui absolutely refuses to let her stay, saying that they're taking her back to Ishigami Village at the next opportunity. However, afterwards Francois explains to Suika that he's being stern because they're in the middle of a dangerous mission and he'd never risk a child's life. When the ship gets attacked by people with the "stone beam", Ryusui's last act is to get Suika to safety, and after they de-petrify him he praises her for a job well done under difficult circumstances.
Determinator: One of the positives that come from his greedy nature is that Ryusui does not give up on the things that he wants. And while that would be bad in most circumstances, Ryusui's greed extends to the people around him as well. One of his goals is to never see a beautiful woman cry again, and he considers every woman he's seen thus far beautiful, even the elderly.
Dressed to Plunder: His default outfit is a tricorner hat with the Kingdom of Science logo reshaped like a skull with Badass Longcoat. The manga illustrations make these even more stylized and also add a classic eyepath.
Extreme Omnisexual: He Has a Type when it comes to women... but that type is every single woman in the world. And he also mentions being into men a few times. This fits with his All-Loving Hero nature.
Ryusui: I love all women, you see, so naturally that includes you. Men too!! I desire them all!!
Fiction 500: The conglomerate he was part of was rated as valuing of 200 trillion yens, approximately 1.8 trillion dollars. He immediately works to recreate this, demanding monopoly of any oil found and printing money backed by his oil.
Foil: As Minami states, Ryusui is everything Tsukasa doesn't want in the world: a lustful capitalist who wants to own everything and thinks only about himself. Fortunately for Senku, he's much more reasonable than presented.
Good Capitalism, Evil Capitalism: He introduces Dragos as a new currency and begins charging prices for previously free commodities. However, Senku still demanded some physical labor for them, while Ryusui uses Dragos as a physical symbol of trust: the more you do for him, the more he promises to give back.
Greed: His primary character trait, though it's not always treated as a problem since it gives him the drive to help rebuild society so that he can live in wealth and luxury again. Later on, Ryusui makes it clear that, at least in his case, it's a truly positive trait. He's so greedy that he wants the best not only for himself but for everyone around him. The extent of his greed is so great he can be greedy on behalf of other people.
Hidden Depths: His debaucherous lifestyle is funded by money he made HIMSELF through the stock exchange, gambling, various competitions, etc. Albeit with significant seed money.
Hyper-Awareness: Not only is he very intelligent, he also has good attention to detail and sensibility to the wind and water flow, which helps his skills as a sailor.
I Know Mortal Kombat: Playing videogames has trained him to shoot a gun while simultaneously piloting drones and a plane.
It's All About Me: Ryusui's ego is through the roof and he demands to focus most of the attention, treatment, and resources on him. However, he is willing to put in hard work himself and will fairly trade with others. As Francois puts it, he wants to be surrounded by shining people instead of shining himself.
Literally Shattered Lives: In Chapter 116, after being re-petrified by the villains on Takarajima, Kohaku breaks him into small pieces so she can ship him back to Senku in his "mouse drones". They put him back together and de-petrify him shortly thereafter; it helps that Kohaku broke him very precisely to make it easy and avoid small fragments chipping off.
Meaningful Name: 'Nanami' literally means "Seven Seas", and "Ryusui" means 'Water Dragon'— so, his name can be read as "Water Dragon of the Seven Seas", a fitting name for a captain.
Mr. Vice Guy: Is extremely greedy, but his greed is often for the happiness of those around him.
The Navigator: The special Sailor skill Senku revived him for is the ability to read winds and geographical orientation, which is essential for naval and aerial navigation.
Non-Action Guy: Like Senku, but Ryusui is far more notable because he's inexplicably jacked just like Tsukasa or Taiju despite not being a fighter or a laborer.
Power Copying: One of the potential applications of his greed is that if he sees someone use a skill that he desires, he can learn it very quickly. This allows him to copy his opponents' dogfighting techniques after seeing them just once in chapter 164.
Renaissance Man: His greed is his main motivation to be an expert in many disciplines. So far, he is an expert sailor, videogame programmer, stockholder and business mogul, ship model builder, expert pilot, on top of being in top physical condition.
Scars Are Forever: As with every character released from stone, he has a form of scarring on his body from the process; in his case, his entire right-hand looks like it was dipped in ink palm-first, seemingly representative of his greed in the stone world. After being petrified and restored a second time in the Treasure Island arc the scars are gone, suggesting that they were the product of thousands of years of weathering.
Sherlock Scan: Ryusui has the talent of quickly get the situation shortly after depetrification because of his Hyper-Awareness, needing little to no exposition of what is happening.
- As soon as he gets revived the first time, with only a few glances at his environment, the new people who rescued him and Francois' absence, he correctly deduces that modern society and his wealth are completely gone and if he got revived is because they need his talents to build civilization up again.
- During the Treasure Island arc, he is the first of the crew to be revived, and given the circumstances and the cave they are hidden in, he correctly deduces that they need to locate Kaseki's fragments and revive him to construct a new gadget. He only fails at guessing that Senku is building a drone.
- Senku uses this to formulate the counter attack against Ibara. While Senku is running away from Ibara, he depetrifies Ryusui, who grabs Moz's earplug and gets the drone to Senku's location.
Silly Rabbit, Cynicism Is for Losers!: In Chapter 124, after Senku finally invents firearms, Ukyo says that he still wants to avoid bloodshed, fully expecting that the others will think his idealism is foolish in such a dire situation. However, Ryusui says that Ukyo's attitude is completely logical, since killing people just makes enemies of their friends and family, which is why they aren't going to kill anyone with their gun.
Take Over the World: His stated goal is to restore the Nanami Conglomerate and then own everything on Earth. Senku doesn't really mind, since it means he's more than willing to help restore the civilization.
Taking the Bullet: During the Treasure Island arc, he's taken out of commission when he kicks Suika out of the way and off the boat before he and the others on the boat got petrified by the petrifying device.
Whole Costume Reference: After getting into space, Ryusui is wearing Captain Harlock's iconic outfit.

Francois

Voiced by: Maaya Sakamoto (Japanese), Michelle Rojas (English), Carla Castañeda (Latin American Spanish)

"Desire is noble."

Nanami Ryusui's butler. A faithful and extremely talented servant whose services were in high demand before civilization fell.

Ambiguous Gender: To the point where nobody knows if Francois is a Bishōnen or a Bifauxnen. Even Ryusui has no idea, though in his case he simply doesn't care.
Character Catchphrase: "Desire is noble", when approving Ryusui's ambitions.
Determinator: As soon as they are unpetrified and learns Ryusui's location, Francois walks to him in a straight line for 2 days without a break.
Foreshadowing: Is mentioned when Ryusui reflexively tells Francois to write Senku and the others a check as thanks for freeing him from petrification but doesn't properly come into the story until it's determined that they need a chef.
The Jeeves: As Nanami Conglomerate's butler, Francois is very faithful to Ryusui and can perform any job expected of them to extreme efficiency.
Not So Stoic: Normally a professional butler and chef, Francois in Chapter 202 is visibly flustered and excited at the thought of acquiring olive oil for cooking.
Supreme Chef: The reason why Team Science needs to resurrect Francois since they need someone who can prepare long-lasting rations for their upcoming sea voyage.
Undying Loyalty: Fittingly for a butler held in such high regard, from the moment Francois is restored, Francois' only concern is how to fulfill Francois' employer's desires. Even after Francois wakes up in the stone world, the first action taken is to return to Ryusui's side.
The Unfettered: Does Ryusui desire "X"? Then "X" will be done. Other factors are irrelevant.

Sai Nanami

https://static.tvtropes.org/pmwiki/pub/images/sai_7.png

Ryusui's older brother. He was a math prodigy from a young age, but refused to work for Nanami Corp., instead fleeing to India to become a game programmer.

Astonishingly Appropriate Appearance: Certain scenes show his darkened hands are covered in multiple small cracks that look like Tron Lines, alluding to his desire to be a programmer.
Blessed with Suck: He hates being a math prodigy, as it means everyone expects him to do boring calculations for them, with his parents raising him to become an actuary. He'd much rather develop games instead.
Child Prodigy: At a young age, he was already doing large multiplications instantly in his head, and quickly mastered other forms of math such as algebra, topology, and set theory.
Fling a Light into the Future: A relatively short-term variation. After Sai's told it would take about a decade at best before modern computers can be reconstructed, he decides to do the next best thing and mentally recreates the original NES machine code for Dragon Quest from scratch to implement later on.
Good with Numbers: Exceptionally so, to the point of doing 10-digit multiplication mentally with only a glance. Sai doesn't really think much of this, however, pointing out a computer could do the same calculation just as fast.
Insistent Terminology: He's not a mathematician, he's a coding expert.
Oh, Crap!: When he saw Ryusui again after many years of petrification, Sai immediately ran away from him, knowing what his brother will do due to his expert Mathematics skills.

Astronauts (unmarked Season 1 spoilers)

A multinational team of six astronauts and cosmonauts, who were spared from petrification due to being aboard the International Space Station at the time of the event. They subsequently returned to Earth in a pair of Soyuz spacecraft, living out their final days on a secluded island.

In General

Adam and Eve Plot: There were only six people aboard the International Space Station during the stone incident — three men and three women — so they presumably got to repopulating the planet after they landed from space. It would definitely appear that way at least, as both Senku and Tsukasa point out that Kohaku appears to have foreign blood in her despite being in Japan... and sure enough, at least four of the astronauts appeared to have been Caucasian.
But What About the Astronauts?: When the petrification hit, they were the only six humans unaffected due to being in orbit on the international space station. They even witnessed it occurring as a bright light enveloping the earth.
Hero of Another Story: As noted above, they were seemingly the only six humans not affected by the "Petrification Beam" and began the process of repopulating the planet and building a foundation that could hopefully be used to restore the petrified people. The short spin-off Dr. Stone reboot: Byakuya actually is their "Another Story".
Multinational Team: The group consists of three Russians, a Japanese, a Chinese-American and a Caucasian American from the South.
Phenotype Stereotype: All of the Caucasian members of the astronaut team are blondes.
Posthumous Character: Having not been turned to stone, they're all obviously long-dead by the time the series picks up nearly 4,000 years in the future. More specifically, Chapter 45 reveals that most of the astronauts were eventually killed by Pneumonia.
Strong Family Resemblance: Some of the villagers more closely resemble their distant ancestors than others.

Byakuya Ishigami

Voiced by: Keiji Fujiwara (season 1), Satoshi Mikami (season 3) (Japanese), Kent Williams (English), Héctor Estrada (Latin American Spanish)

"...I'm sure you're not the kind of kid to watch these broadcasts... but I swear I'll bring you back home a mountain of scientific souvenirs from space!"

"Wait to be rescued? You've got it totally wrong... we're the ones that are going to do the rescuing! For the entirety of humanity... All 7 billion of them!"

Charming and mischievous, Byakuya was one of the astronauts stationed aboard the International Space Station during the stone incident, and the sole Japanese member of the expedition.

Adaptational Dye-Job: His hair color isn't entirely consistent in illustrations, but Senku and Byakuya tend to share the same hair color. In the anime, Senku is blond with green tints while Byakuya's hair is entirely white.
Celebrity Survivor: As an astronaut, he was popular and well-known enough in Japan for the kids in Senku's class to instantly recognize him just by hearing his name.
Chick Magnet: The girls in Senku's class and the reporter doing the live coverage on the day of the launch were all smitten with him. He eventually got together with Lilian and had children with her upon landing back on Earth, as well.
Determinator: Byakuya spend his entire life after returning to Earth preparing it for Senku's return. Just leaving the stories and clues for Senku and believing he would be there in the future to make use of them would qualify Byakuya for this trope, but in Chapter 115, we see that he literally spent the rest of his life gathering rare metals that would help Senku in the future, finally dying of old age while panning for gold in a river. And his efforts paid major dividends, as he was able to collect an astonishing amount of platinum from that single river.
Fling a Light into the Future: He came up with the 100 stories of Ishigami village, both as a way to teach future generations about how to survive and to ensure that Senku would have allies to help him rebuild the world. He also made sure he was buried with a time capsule containing a record that plays out a message for Senku and a song for the villagers in case Senku couldn't convince them to help him restore humanity. Later, we find out that Byakuya also spent the last decades of his life gathering rare materials for Senku, literally working until he collapsed into the river and couldn't get back up. Said materials provided Senku with a way to manufacture the revival formula at a rapid pace. Byakuya is a contender for patron saint of light-flinging.
Good Parents: He and Senku had a pretty healthy father-son relationship, Byakuya selling his car to buy Senku a lab in order to foster his early interest in science, and including a farewell message in the 100 Stories. He also quite literally works himself to death gathering materials for Senku in the future.
Last of His Kind: He outlived the other astronauts by decades. Thus, he believed it was his duty to prepare for the rebirth of science.
Meaningful Name: His surname means stone-god. In fact, it's even more appropriate for Byakuya than Senku, as Byakuya was quite literally the first leader of the Stone World.
Parental Substitute: He did not sire Senku himself but raised him on behalf of a friend of his. Regardless, the two of them are peas in a pod; for them, biological connection is ten billion percent unnecessary.
The Reveal:
- Byakuya is Senku's father and the founder of the village, and he even passed on legends about Senku himself down the royal line. This is why Ruri knew Senku's surname before he even told her.
- It's revealed that he and Senku are not blood related. Senku is the son of a friend of his that decided to raise.
Shared Family Quirks:
- Like Senku, he was a bit of a Troll; the first thing he does when he goes to space is convince Lilian to act like a diva just to annoy everybody, and then he teases her by playing her music on the station against her wishes.
- Neither he nor Senku care much for ceremony either; his recorded message to Senku starts off sounding completely serious before he cracks up and says that this mushy stuff isn't their style. Senku likewise laughs and says "He gets me!"
Walking Spoiler: It's hard to know too much about him without putting it together that he's Senku's father and the founder of Ishigami village.

Lilian Weinberg

Voiced by: Lynn (Japanese), Caitlin Glass (English), Laura Pitt-Pulford (singing voice), Miriam Aceves (Latin American Spanish)

A famous American pop star who paid 50 million dollars to visit the International Space Station as a space tourist, presumably for promotional purposes.

Celebrity Survivor: She was a pop star before the Stone incident, even broadcasting a live performance to her fans on social media from space.
Dark and Troubled Past: As seen in the flashbacks during her songs, Lilian grew up in a poor household with an alcoholic father, and her only escape from that reality was music. As she tells her story to Byakuya, she gets angry at him for falling asleep in the middle. It's only while singing in Shamil and Connie's wedding that she remembers her past and runs away crying.
Died in Your Arms Tonight: Without warning, she grows ill after Shamil's death, and then she dies peacefully in Byakuya's arms, from undiagnosed sickness. It was most likely a sudden onset of pneumonia.
Go Out with a Smile: Lilian passes away smiling.
Hair of Gold, Heart of Gold: She tells Byakuya that, while she loves singing for herself, she wants to make others happy with her songs. The one she broadcasts to the entire world from the station is one of encouragement. Both of these traits were evidently inherited by Kohaku and Ruri.
Luminescent Blush: Her full face goes red when Byakuya laughs at her diva prank.
Nice Girl: After doing her diva prank, she apologizes and gives the rest of the crew a very warm welcome, showing that she's actually a nice person.
Phenotype Stereotype: She's American, and she has blonde hair and blue eyes. It's because of her that several members of Ishigami Village have blonde hair and/or blue eyes, most notably Kohaku and Ruri.
Rags to Riches: Flashbacks of her childhood showed up growing up in poverty. She manages to break out of that when she successfully becomes a singer.
Rich Bitch: In her first scene she enters the International Space Station and starts throwing a tantrum about how uncomfortable it is and how she deserves special treatment because she's rich and famous...and then Byakuya cracks up and Lilian chastizes him for ruining the prank too early.
Southern Belle: Implied, since according to Nikki she had a "subtle Southern accent". Caitlin Glass actually gives her such an accent in the English dub.
Uncanny Family Resemblance: It's pretty obvious that Kohaku and Ruri's family line is descended from her.

Shamil Volkov

Voiced by: Showtaro Morikubo (Japanese), Patrick Seitz (English), Fernando Moctezuma (Latin American Spanish)

A snarky, deadpan Russian cosmonaut who was on board the International Space Station.

All There in the Manual: His surname doesn't appear in the story proper, but on the splash page for Chapter 43, which shows the six astronauts in their spacesuits, his name tag visible.
Deadpan Snarker: Byakuya even compares him to his son Senku, calling him a "snotty smart-aleck".
Happily Married: To Connie, about 3 years after they landed back on Earth. From his last talk with Byakuya, he tells about how happy he was to have tasted that ramen in space, and for a short while having a wife and children.
Incurable Cough of Death: He starts coughing too after Connie's death, and dies from pneumonia sometime later.
The Stoic: Doesn't emote much beyond "mildly annoyed" and ''quite annoyed", though he was stunned when he witnessed the stone explosion on Earth.

Connie Lee

Voiced by: Hisako Kanemoto (Japanese), Erica Mendez (English)

An American astronaut aboard the International Space Station.

Fangirl: Her first scene is her fangirling over Lilian and declaring herself a superfan. She even brought one of Lilian's albums, "One Small Step" with her to the station.
Girlish Pigtails: Wears her hair in two plaits, which makes her all the more adorable when she fangirls (and in general).
Incurable Cough of Death: Eventually becomes the first of the astronauts to die of pneumonia.
Prone to Tears: Usually the first to start crying when things take a turn for the worse:
- After the astronauts lose contact with both NASA and its Russian counterpart Roscosmos, Connie assumes humanity had been wiped out in a nuclear war and bursts into tears
- Later, when the astronauts and cosmonauts make landfall near a secluded island, their hopes of seeing a hermit and fellow survivor are dashed when they discover that he, too, has been petrified, leaving them as the last six un-petrified humans alive on Earth.

Yakov Nikitin

Voiced by: Kanehira Yamamoto (Japanese), Mike Pollock (English), Jorge Ornelas (Latin American Spanish)

A Russian cosmonaut aboard the International Space Station, husband to Darya Nikitina.

Never Found the Body: Lost at sea along with his wife Darya when the two of them attempted to take a boat to mainland Japan in search of medicine for the pneumonia-afflicted Connie.
Running Gag: It's made quite clear in the Byakuya Spin-Off that he is Kaseki's ancestor. They have similar facial features and, like his distant descendant, his muscles are also bursting his clothes off whenever he gets fired up about something.

Darya Nikitina

Voiced by: Rie Tanaka (Japanese), Rachel Robinson (English)

A Russian cosmonaut aboard the International Space Station, wife to Yakov Nikitin.

Has a Type: She is very much in love with her husband Yakov and goes completely doe-eyed whenever he gets fired up and his muscles rip his clothes off.
Never Found the Body: Lost at sea along with her husband Yakov when the two of them attempted to take a boat to mainland Japan in search of medicine for the pneumonia-afflicted Connie.

Rei (Reboot Spinoff only character)

https://static.tvtropes.org/pmwiki/pub/images/rei_ver_37.png

A Zero-gravity flying robot created by Byakuya with Senku's help, in order to assist the space mission. It is introduced as Rei v37, but its version number continuously grows as it replaces and upgrades its body in order to fulfill its single-minded goal of keeping the ISS in orbit as long as possible out of a false hope that Byakuya may one day return to it.

Absurdly Dedicated Worker: It comes with being a Determinator. That being said it's not like it enjoys having to keep fixing the ISS in order to keep it in orbit.
Artificial Family Member: Byakuya may be long gone, and Senku might be Taken for Granite, but that doesn't stop Rei from branding itself an Ishigami.
Benevolent A.I.: It's been programmed with the majority of humanity's knowledge and science, but not much common sense. That being said, it is especially useful to the astronauts in making the necessary calculations for them to return. And it's the one staying behind the ISS to take care of things so that the astronauts can safely land on earth. And it averts a meteor strike that would have wiped out all life on the planet.
Brutal Honesty: Comes with having No Social Skills programmed into it. When Byakuya tries to brag about its abilities by saying it has the computing capabilities of "60 smartphones", Rei merely replies "Our R&D department was underfunded".
Character Catch Phrase: It responds with "your assessment is appreciated" whenever somebody addresses it. The response is the same whether somebody is praising how cute it looks (Lillian) or calling it a "useless" (Shamil)
Cute Machines: Lillian certainly thinks so.
Determinator: The instructions given to it by Byakuya were to wait for him on the ISS. As such, it will do anything to keep it in orbit. Even make a "spaceship" with the left-over space-suits, invent things ala Senku and come up with science that hasn't been achieved by humanity yet.
- When it finds out that a giant meteor is about to hit Japan and wipe out all life on the planet, Rei does everything in its power to protect earth. It ultimately succeeds but at a huge cost of the ISS and its resources.
Death by Adaptation: In episode 17 of the anime the International Space Station goes down a few years after the astronauts return to Earth, with Rei still inside it, and Byakuya is shown watching its remains as they burn into the atmosphere.^note In the Byakuya spinoff manga, Rei manages to keep the ISS in space (and consequently itself alive), for well over 3500 years, long after Byakuya has passed away. The fact that they are not encountered during Senku and Co's final trip to the moon suggests they actually did get destroyed this way, and that the Spin-off's events belong to an Alternate Continuity, separate from the main manga's canon.
Deus est Machina: It sort of becomes one by chapter 8. It doesn't directly affect humanity's course but it protects Earth from a Class 5 apocalypse, by averting a meteor strike. And in the very last panel of Chapter 8, it's shown the surviving human population has put up a sign to acknowledge the light signal that Rei lights up every year for Byakuya, indicating a possible Cargo Cult forming.
Disney Death: A rare justified version of the trope. In the final chapter of the Spinoff, Rei eventually succumbs to the damage caused by years of wearing and solar-ray memory retardation but not before building a giant space 3D printer with detailed instructions on how to remake both Rei and the ISS from scratch and storing its personality within those instructions. At the same time Senku wakes up from his petrification the reconstruction of the ISS is completed, with Rei remaking itself to look like the Robot Girl model we saw in chapter 01.
Do Androids Dream?: During the final chapter, as Rei is about to stop functioning, it ponders its existence. It wonders how many years humans live and if Byakuya will return for it tomorrow. It realizes that it's best not to know these things because waiting is a reason for living. As it looks back on its final remaining memory, its very first one, and remember how lonely Byakuya used to be, it concludes that there is meaning in a lifetime of waiting.
Dumbass No More: Well, it's not like Rei was stupid to begin with but over 40 years of doing continuous Equipment Upgrade to itself, its brain and the ISS has drastically improved its intellect. It starts off as a robot with the intellectual capacity of 60 smartphones, capable of doing simple calculations, and it ends up with the intellect of "over 3000 Smartphone Points" capable of self-maintaining the ISS, coming up with inventions and making long-term plans. And it becomes smart enough to single handedly avert planet-wide life extinction by meteor strike.
Expy: It looks a lot like Boichi's Robot avatar, and shares a lot of its features, such as flying, changing expressions/head decorations and displaying messages (eg Yikes) according to the occasion. That is, until its rebirth in the final chapter.
Flawed Prototype: Played with. We see a robot name "Rei v01" with the face of a pretty girl. When Senku excitedly asks if that's the robot Byakuya is building, he answers that no, it's not, since he lacks the know-how and the materials to make a robot shaped like a girl. He then proceeds to show him a clunky robot named "Rei v23", the actual prototype. This actually gets Senku more excited, and it's implied the two worked on the robot together. The version that makes it in space is number 37. The final chapter reveals that Rei maintains its memories from version to version and still remembers the first time it saw Senku and Byakuya.
Flashback Fail: As the sun's cosmic slowly affect its fine memory circuits, with no ability to fix and upgrade itself after the events of chapter 8, Rei starts losing its memories of the past. Its final remaining memories are Lillian's final dance and song in space and its first memory of Senku and Byakuya.
Goal-Oriented Evolution: It has a single goal, namely to keep the ISS in orbit until Byakuya returns for it. And it will make any adjustment to itself and the ISS necessary in order to achieve that goal.
Godiva Hair: As a nude Robot Girl after its revival.
Grew Beyond Their Programming: It starts off as a simply as Byakuya's Robot Buddy. It ends up becoming a self-reliant mechanical lifeform, fully capable of fixing/upgrading itself and the ISS, developing an identity of its own (branding itself as a member of the Ishigami family), and single-handedly averting a life-erasing meteor strike.
Heroic Sacrifice: In the form of a Pyrrhic Victory. In order to protect the earth from a meteor strike that would result in a Class 5 apocalypse, Rei sacrifices almost all of its resources, a large chunk of the ISS and its ability to fix/upgrade itself. The last few panels of chapters 8 show Rei in really beat-up condition and it's clear that both it and the ISS are on their last legs. And, yet, despite that, it's still determined to keep the light signal going, despite the huge energy cost it has.
Honor Before Reason: Or rather The Promise before reason. Due to averting the meteor strike, most of Rei's materials have been used up, most of the ISS has been dismantled, and it's no longer able to fix/upgrade itself. And yet it saved the powerful light signal, and it's determined to keep it going in order to show Byakuya it's still alive in space, despite mentioning in a previous chapter that it consumes a lot of energy. Then again Byakuya didn't program Rei with any "reason" to begin with.
Instant A.I.: Just Add Water!: It's definitely a Benevolent A.I., but it develops a mind of its own, once the astronauts leave the ISS and it's left on its own devices, going as far as to brand itself as a member of the Ishigami family.
I Will Wait for You: A non-romantic variation. During the final chapter Rei decides it's worth waiting for Byakuya to get back in space and goes back to sending the light signal.
Like Father, Like Son: Or rather "like creator". It shares a lot of Senku's ingenuity and Determinator characteristics, with the addition of being quite good at crafting. Heck it even sports Senku's hair-style at some point and by chapter 8 it calls itself an Ishigami.
Machine Empathy: Inverted Trope. The main reason Rei remakes itself into a Robot Girl during the final chapter is because as the clunky Rei 23 prototype, it heard Senku comment on how lonely Byakuya was and it thought it was something Byakuya genuinely wanted.
Mechanical Lifeforms: It's capable of self-preservation and coming up with solutions to the various situations that threaten to take the ISS down.
Mysterious Protector: Senku, still being Taken for Granite on Earth, watches Rei avert a meteor strike, but he doesn't know that it was the little robot that saved all life on earth.
Naked on Revival: During the final chapter, Rei creates a new body which resembles that of a naked woman.
No Social Skills: It sees no problem with telling Dalia that she looks "over 1000 years old". Then, again, Byakuya probably thought it didn't need to know these sorts of things.
The Pig-Pen: After sending the life-destroying meteor off its collision course and averting a Class 5 apocalypse Rei is no longer able to upgrade/fix itself and it's shown to be in a really dirty and beat-up shape. It gets better after its revival though.
Photographic Memory: Well, it's a robot so that's a Justified Trope. The sun's cosmic rays do end up erasing it though.
The Promise: What motivates it to keep working on the ISS is Byakuya's word that he will eventually return for it. Sadly, since it lacks common-sense circuitry, Rei doesn't realize Byakuya meant it as an Empty Promise, in order to keep its artificial mind at peace.
Robot Buddy: Starts out this way for Byakuya and the astronauts. He ultimately becomes Earth's savior.
Robot Girl: It becomes one at the conclusion of the story, albeit one with an Ambiguous Gender.
Sliding Scale of Robot Intelligence: It starts of as a "3" and by chapter 8 via a combination of The Promise, Grew Beyond Their Programming and Goal-Oriented Evolution it becomes a solid "5".
Supporting Protagonist: Its main function is to support the astronauts and make sure they return to earth safely. Once that is done, after chapter 4, the story shifts focus on its efforts to keep the ISS in orbit until the the humans return for it.
Worth Living For: During its final moments in chapter 9 it concludes that there is meaning in a lifetime of waiting, so it is going to keep waiting for humanity to get back in space.

America

Stanley Snyder

An ex-Marine who works for Dr. Xeno.

Agent Peacock: In addition to his traditionally feminine beauty, he appears to be wearing lipstick at all times, adding to the initial Viewer Gender Confusion he faced. Though downplayed so far in that his personality is as cold and serious as his profession as a sniper would suggest.
Ambiguously Gay: In Chapter 221, Stanley caresses Xeno's face and lips in a way that is hard to view as strictly platonic, while not outright stating that they're lovers.
Awesomeness by Analysis: While he gets upset by Luna glancing straight at him once Ryusui realizes a sniper is nearby, Stanley knows that out of the three suspects on the deck only Senku will react to her, and then deduces exactly how he is going to try to avoid the shot.
Childhood Friends: With Xeno.
Cold Sniper: He was actually a trained military sniper back in the old world, which helped him maintain his focus while petrified. Later it's shown that he has absolutely no problem assassinating Taiju (who he mistakenly thinks is the Kingdom of Science's chief scientist).
Consummate Professional: What Francois realizes about him and his forces. Stanley and his men are professional soldiers, not merely killers. So while they Would Hurt a Child if that's their mission, they won't kill civilians for no reason.
The Dragon: To Xeno.
Evil Counterpart: The manga implies that Stanley is an evil version of Taiju: the childhood friend of a scientist who acts as his personal muscle and determined fighter. However, unlike Taiju, he's much more willing to do immoral or horrid actions to help Xeno accomplish his goals.
Face Death with Dignity: Not actually death but he realizes that he will more than likely not be brought back from petrification a second time. He takes a pose and a puff of his cigarette as the wave overtakes him.
Graceful Loser: When he is about to get petrified a second time, he simply takes off his gear and lights One Last Smoke, acknowledging that the Kingdom of Science has won all with a calm look on his face, a complete opposite of Ibara who went out screaming Big "NO!".
Improbable Aiming Skills: Stanley is an absolutely incredible marksman. In Chapter 221, he's able to almost instantly answer when quizzed on the firing angle to hit a target from 1 kilometer away while compensating for the gravity and lack of atmosphere on the moon, faster even than Senku could calculate it.
More Dakka: Him using a machine gun is the first sign that the people of the USA have technology more advanced than Senku.
One Last Smoke: In chapter 193, as the second petrification wave is about to hit, he realises that foiling the Kingdom of Science's plan to revive one of their own could easily doom all of humanity, and, taking solace in the idea that Xeno would most likely be revived for his expertise, he drops his weapon and lights one last cigarette.
Semper Fi: He served in the Marines before he was petrified.
Smoking Is Cool: Lights a cigarette whenever he has his mask off, despite Xeno warning about its effect on his health.
There Is No Kill Like Overkill: His "sniper rifle" takes massive bullets. We are shown that, should he succeed in his assassination, the entire top half of Taiju's body would be reduced to Pink Mist. Fortunately, when he actually took the shot, he used a smaller caliber that broke into smaller fragments and missed Senku's vitals, in hope that Senku would reveal the revival formula on his deathbed.
Trigger-Happy: His first response to the Perseus is to open fire on them with a machine gun from an airplane. He makes it clear to Gen later that his plan was to kill everyone. Even when it is clear Senku has no need for conflict and urges Dr. Brody to rebuild civilization with the help of the captured Kingdom of Science members, Brody warns him that Stanley will come after his group and Dr. Xeno with deadly intent all the same.
Would Hurt a Child: He doesn't care how young his targets are. If they oppose him, he will mercilessly hunt them down with the same level of seriousness as he would a professional. That said however...
Would Not Shoot a Civilian: As cold-blooded as he is, he's still a professional soldier and won't harm civilians if they surrender. Francois uses this to save themself and Suika from being killed by Stanley's team.

Dr. Xeno Houston Wingfield

https://static.tvtropes.org/pmwiki/pub/images/dr_xeno.png

A former NASA scientist and mentor to Senku with extremely ruthless views on science. Having previously freed himself from petrification and established his own empire, he comes into conflict with the Kingdom of Science when they arrive in America.

Affably Evil: Despite him calling for Senku to be assassinated and choosing to be a dictator, Xeno is quite polite and reasonable. Even voluntarily offering to work with Senku in uncovering the mysteries of the Petrification Event and the Whyman, while he waits for Stanley to rescue him and likely kill Senku.
Ambiguously Gay: In Chapter 221, after being revived, Stanley puts his hand on Xeno's face and caresses his cheeks and lips in a way that is hard to view as strictly platonic, while not outright stating that they're lovers. When the mission to go to the moon begins, Xeno says goodbye to Stanley and hands him a custom packet of chewable cigarette-shaped tobacco while looking visibly nervous. There is also the tender smile that Xeno gave Stanley when he was petrified◊.
Arc Villain: The main antagonist of the America arc, wanting to use science to rule over humanity rather than to improve it.
Awesomeness by Analysis: He can deduce Senku's height purely by listening to a recording of his voice.
Card-Carrying Villain: He told his co-workers he'd use science to become a dictator if he could and loved teaching Senku about destructive technologies, ironically motivating the boy to research countermeasures to them.
Character Catchphrase: Calling science and any other things he likes "elegant".
Character Tics: In a deliberate parallel with Senku, Xeno also has a tic, where he raises a hand to the level of his eye, when he's performing some kind of mental calculation. In his case, he crosses his first two fingers so that the extensions on his nails frame his eye.
Childhood Friends: He says he and Stanley have been friends since they were children.
Connected All Along: He was Byakuya's colleague at NASA and Senku's science master despite their opposite worldviews.
Creepy Long Fingers: His hands and fingers appears unnaturally long and skeletal thanks to his stark white gloves and artificial nail extensions.
Creepy Shadowed Undereyes: The area around his eyes is black, which compliments his sinister personality. It's gone after his Heel–Face Turn.
Dramatic Irony: Xeno had the ingredients of the revival fluid practically handed to him on a silver platter^note, and yet he never even realized that you can chemically revive people until he found out about Senku's group — which is almost the exact inverse of Senku, who discovered the formula almost immediately then struggled to get the ingredients.
Evil Counterpart: Xeno is essentially Senku minus the latter's morality and humanity.
Evil Mentor: Downplayed. While he does state he would use science to dominate over others, he never enacted this until thousands of years after the petrification event. His different beliefs did act as an inspiration to Senku's goal to save people, such as Dr. Xeno's statement of how he would use a rocket to carry biological weapons leading to Senku traveling to Africa to learn about sulfa drugs and the ebola virus.
Femme Fatalons: His most distinctive accessory are the long, bony extensions attached to the fingertips of his gloves. Despite their cumbersome appearance, the artificial nails seems to be designed to help Dr. Xeno better handle delicate instruments thanks to their thin, curved shape, essentially turning Xeno's fingers into forceps and tweezers. As it turns out, they also have another use. The nails are made metal, which the good doctor had magnetized. By coiling a length of radio wire around one of his claws, he was able to send a crude radio signal to Stanley to alert him of his location.
Friendly Enemy: After being captured by the Kingdom of Science, he has nothing to do but to wait for Stanley or for a sabotage opportunity, so he may as well help out his former pupil with the Whyman problem. Kohaku is disgusted by how he and Senku act like two schoolkids despite the fact that Xeno still wants him dead.
No-Nonsense Nemesis: During their assassination mission, Stanley actually asks Xeno if he really wants the student he clearly admires dead. Xeno thinks it over, concludes Senku will be a threat to his plans, and coldly gives him permission to shoot.
Oh, Crap!: Has this look on his face when it seems like he's about to win the fight against Senku's group, only for Tsukasa to come out of nowhere and about to stab Xeno right in the face.
Properly Paranoid: Unlike Senku, who made gunpowder only as leverage against the Empire of Might, Xeno focuses on heavy weaponry and machinery first and foremost, just in case another scientist like him gets revived in some part of the world. He is proven correct, making him the Technologically Advanced Foe against Senku.
Right for the Wrong Reasons: He correctly deduces that the Kingdom of Science knows how to de-petrify absolutely anybody based off of the Perseus's large crew^note, but his reasoning is flawed because he assumes they all were de-petrified, not knowing that the ISS astronauts returned to Earth after the "Stone Beam" and had descendants. This bites him and his soldiers hard when they board the Perseus and find that the primitive warriors are not scared of the machine guns and grenades. The sight of a spear-wielding warrior fearlessly ignoring a machine gun is so shocking to them that it allows the Kingdom of Science to defeat them despite their inferior weapons.
Significant Birth Date: October 1st, which is JAXA's foundation date and NASA's first day of operations.
Take Over the World: He wants to dominate the world and rule over "lesser intellects", something he wasn't hiding even before the petrification. After the Earth got petrified, he's left unopposed, but only has a small crew to work with, though he had no way of knowing how other parts of the world are doing.
Trigger-Happy: If he didn't order Stanley to try to wipe out the Perseus crew upon discovering them, he certainly knew about the plan, as he gives Stanley advice after his plane crashes. Later he decides to have the Perseus' top scientist assassinated even though he doesn't yet know the secret to the revival fluid, which the Perseus' scientist would most likely be able to provide.
Villainous Friendship: With Stanley, who he's been Childhood Friends with, making them a powerful Brains and Brawn duo.
We Can Rule Together: Makes this offer to Chrome while the two are caved in together, since both of them are men of science who have been held back by the existence of less-intelligent people. Chrome refuses, of course.
"X" Marks the Hero: Or rather, the Evil Genius. Fitting with his name, the black scar on his forehead is X-shaped. X is also a feature of his coat and his Thinking Tic. The scar becomes more yellow and symmetrical after his re-petrification and Heel–Face Turn, making it more of a straight example.

Luna Wright

https://static.tvtropes.org/pmwiki/pub/images/luna_manga_colored.png

A beautiful woman who works for Dr. Xeno.

Character Catchphrase: "I'm Luna, the smoothest operator! I'm Luna, the capable gal!" Chapter 157 reveals that she used it as a Survival Mantra to stay conscious while petrified.
Crocodile Tears: She infiltrates the Perseus by putting on the waterworks and crying about how horrible Dr. Xeno is and how she needs immediate help.
The Ditz: Despite all the evidence of Senku being the true scientist aboard the Perseus, from her spying on him making ice cream to his speech about science to his name being on the cone, she remains oblivious and believes Taiju is the true scientist aboard.
Even Evil Has Standards: She shows hesitation in going with Stanley's plan to assassinate Taiju. She immediately does a 180 and goes on about how it's a great idea... while "FAKE" is used as an Unsound Effect.
Hartman Hips: Easily one of the biggest sets in the series, and considering the artist is Boichi, that's saying a lot.
- They're even lampshaded in the story when she's asked her weight (for balance purposes) and lies. Both Carlos and Max note that shouldn't be possible with those proportions.
Has a Type: As she clearly states multiple times she's into the intellectual types. It helps if they have strong convictions too.
In Love with the Mark: She's been sent to assassinate the Kingdom of Science's leader (whom she initially believes to be Taiju), and as she thinks about what kind of person he'd be, she realizes he's exactly the type of man she finds most attractive. This leads her to betray Dr. Xeno and help the Kingdom of Science.
The Medic: Downplayed. She was only a medical student, not a doctor, and she didn't do too well in her classes despite working hard (she only got into medical school because of her father's connections, and she was primarily interested in meeting an intelligent man to fall in love with), but when Senku gets shot by Stanley, she's the Kingdom of Science's only hope of saving his life.
The Mole: She is sent to infiltrate the Perseus in chapter 154. Her main goal is to stand next to Taiju so Stanley can use the stripes on her dress to help him aim his sniper rifle.
MRS Degree: Her main motivation to enroll in medical school was to have an intelligent boyfriend.
Punny Name: May or may not be intentional, but her full name, Luna Wright, is pronounced as Runa Raito in romanized Japanese, which sounds very similar to “moonlight”.
Single Woman Seeks Good Man: Very quickly starts falling for Senku when she sees how noble, well-spoken, and passionate he is about science. Senku, being the genius he is, picks up on this immediately and starts turning up the charm on her as an insurance policy. Which comes back to save his life when he gets shot by Stanley and Luna, a medical student, is willing to betray her kingdom just to treat him.
Wearing a Flag on Your Head: A more subtle version than most; rather than outright wearing American flag clothing, she has a striped dress and star-shaped hair decorations. In the case of the stripes, they were actually insisted on by Stanley, in order to allow him to use their precise width as a demarcation to further enhance the accuracy of his sniper shot.
Why Did It Have to Be Snakes?: She has a big phobia of bugs, as seen when she freaks out at seeing South American army ants.

Carlos Barrios and Max Adams

https://static.tvtropes.org/pmwiki/pub/images/max_and_carlos.png

Left: Max. Right: Carlos.

A pair of guys that follow Luna wherever she goes. Both are incredibly loyal to her.

Badass Driver: Carlos was Luna's driver before being petrified and can maneuver his way through a forest in a vehicle he has never driven before without too much difficulty.
Bodyguard Crush: Max was Luna's bodyguard before being petrified and it's likely he developed feelings towards her as result.
Chekhov's Gun: Prior to the petrification, Carlos purchased a platinum ring for Luna. As the wave approached, he hid it in his mouth. After they're de-petrified, Carlos spits it out and Xeno notices it's platinum, allowing them to leap centuries ahead in technology.
I Want My Beloved to Be Happy: Both men are in love with Luna, to the point they would do anything for her. It's all but stated that their extreme devotion for her is what keep their minds active through the 3000 plus year needed to revive themselves. This includes betraying Xeno the moment Luna tells them that Senku is her boyfriend, and choosing to support Senku's group because they want to make her happy.
Language Barrier: Somewhat averted. They can't speak Japanese, and Taiju can't speak English, but Taiju's immense enthusiasm is somehow understandable, and Taiju can pick up on certain words like names.
Those Two Guys: Are almost always seen together.

Dr. Brody Dudley

https://static.tvtropes.org/pmwiki/pub/images/brody_sketch_8.png

A mechanic working for Dr. Xeno, designing his weapons and crafts.

Evil Counterpart: Is one for Kaseki as the older craftsman of Xeno's group. The two are even seen facing off in the Science vs Science panel in chapter 161.
The Engineer: Was responsible for building Xeno's inventions, including a potential game-changer that's meant to capture the Perseus.
Reasonable Authority Figure: Chrome and Gen single him out as the one high-ranked guy who's amicable and concerned with human life, so Senku calls him for negotiations and bluntly entrusts him with the revival formula and a plan to establish a city with a million inhabitants.

Dr. Chelsea Childe

https://static.tvtropes.org/pmwiki/pub/images/dr_chelsea.PNG

A scientist who excels at geography. She was stranded in the forest until Senku and Xeno found her while traveling to South America.

Alliterative Name: Chelsea Childe.
Bankruptcy Barrel: Not quite a barrel, but when she is first seen, she's wearing a hollowed-out pumpkin in a manner reminescent of this trope.
Blind Without 'Em: She suffers from myopia, like Suika. Because of this, she failed to read the sign pointing north towards Dr. Xeno's castle and headed south instead.
Brutal Honesty: Much like Senku, she's not afraid to be blunt with others.
Character Tics: Like Senku and Xeno, Chelsea too has a hand gesture she uses when thinking, which is something similar to an “Okay” sign, which she holds at about the level of her chin.
The Navigator: Her main skill is her extensive knowledge of geography, which she uses to guide Senku and his crew through South America.
Older Than They Look: When she described herself as "barely a teen", many assumed she meant that as in she's barely turned into a teenager, so approximately 13-14; however, according to Word of God, she actually meant that in the sense that she's barely still a teenager, meaning she's actually 18 or 19 years old. Despite this, she stands at merely 148cm (4'10") and could probably pass for about 9 years old, let alone 13.
Teen Genius: Despite describing herself as "barely a teen", she has memorized the layout of the entire world. She demonstrates this by giving Senku a shortcut through the Amazon jungle.

Joel Gear

https://static.tvtropes.org/pmwiki/pub/images/joel.PNG

A famous watchmaker who used to work for Rodex. He's skilled at working with very intricate machines such as the Medusa.

Astonishingly Appropriate Appearance: The numbers 12 (in his Hair Antennae), 3 (on his left arm), 6 (on his apron), 9 (on his right arm) and a necktie resembling clock hands. Their positions match where they'd be on a clock, which is very fitting for a watchmaker.
Bland-Name Product: "Rodex", his past employer, for real-life watch manufacturer Rolex.
Cannot Talk to Women: While he's incredibly cocky and rude to other men, he's so shy around pretty women (due to being such a workaholic that he never learned how to socialize) that he can barely even mutter anything in their prescence. It makes for some entertaining interactions with the rest of the cast.
Hair Antennae: He has two strands on top of his head in the shape of the number "12". Alongside the numbers on his clothes and his necklace shaped like clock hands, they create the appearance of a clock face. In an inversion of this trope's normal use, he's shown to be a serious and intelligent person.
Jerk with a Heart of Gold: He's condesceding and rude to men in addition to being somewhat of an Insufferable Genius when it comes to his craft, but he's ultimately quick to come on board to the Kingdom of Science.
Naked Freak-Out: The first person to have this reaction after being revived.
No Social Skills: He's so intimidated by beautfiful women that he can barely even speak when they talk to him. On the flipside, he's also got no social skills in the opposite sense with men; a lifetime of being a loner absorbed in his own work and with nothing to do but admire his own skill has made him incredibly cocky and abrasive with men, bordering on Jerkass territory.
The Watchmaker: His past profession gives him the skills needed to examine the Medusa's mechanism and figure out how to restore its power, even though its workings are beyond the understanding of modern science.
Workaholic: Spent his whole life working, which meant he had little time to develop social skills. Even after being revived, he borrows Brody's tools to quickly build a fancy watch with a secret built-in radio off-page, and he's so focused on work that he threatens to murder anyone who distracts him by speaking even one word while he's examining the Medusa.

Characters / Dr. Stone: Pre-Stone World

Kingdom Of Science

Senku Ishigami

Voiced by: Yūsuke Kobayashi (teen), Mikako Komatsu (child) (Japanese), Aaron Dismuke (teen), Mikaela Krantz (child) (English), Alejandro Orozco (Latin American Spanish)

Taiju Oki

Voiced by: Makoto Furukawa (teen), Mutsumi Tamura (child) (Japanese), Ricco Fajardo (teen), Emily Fajardo (child) (English), Miguel Ángel Ruiz (teen), Diego Becerril (child, Episode 4) (Latin American Spanish)

Yuzuriha Ogawa

Voiced by: Kana Ichinose (Japanese), Brittany Lauda (English), Jessica Angeles (Latin American Spanish)

Gen Asagiri

Voiced by: Kengo Kawanishi (Japanese), Brandon McInnis (English), Brandon Santini (Latin American Spanish)

Voiced by: Ryōta Suzuki (Japanese), Clifford Chapin (English), Óscar Flores (Latin American Spanish)

Voiced by: Maaya Sakamoto (Japanese), Michelle Rojas (English), Carla Castañeda (Latin American Spanish)

Astronauts (unmarked Season 1 spoilers)

Voiced by: Keiji Fujiwara (season 1), Satoshi Mikami (season 3) (Japanese), Kent Williams (English), Héctor Estrada (Latin American Spanish)

Voiced by: Lynn (Japanese), Caitlin Glass (English), Laura Pitt-Pulford (singing voice), Miriam Aceves (Latin American Spanish)

Voiced by: Showtaro Morikubo (Japanese), Patrick Seitz (English), Fernando Moctezuma (Latin American Spanish)

Voiced by: Hisako Kanemoto (Japanese), Erica Mendez (English)

Voiced by: Kanehira Yamamoto (Japanese), Mike Pollock (English), Jorge Ornelas (Latin American Spanish)

Voiced by: Rie Tanaka (Japanese), Rachel Robinson (English)

America

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Characters / Dr. Stone: Pre-Stone World

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Kingdom Of Science

Senku Ishigami

Voiced by: Yūsuke Kobayashi (teen), Mikako Komatsu (child) (Japanese), Aaron Dismuke (teen), Mikaela Krantz (child) (English), Alejandro Orozco (Latin American Spanish)

Taiju Oki

Voiced by: Makoto Furukawa (teen), Mutsumi Tamura (child) (Japanese), Ricco Fajardo (teen), Emily Fajardo (child) (English), Miguel Ángel Ruiz (teen), Diego Becerril (child, Episode 4) (Latin American Spanish)

Yuzuriha Ogawa

Voiced by: Kana Ichinose (Japanese), Brittany Lauda (English), Jessica Angeles (Latin American Spanish)

Gen Asagiri

Voiced by: Kengo Kawanishi (Japanese), Brandon McInnis (English), Brandon Santini (Latin American Spanish)

Voiced by: Ryōta Suzuki (Japanese), Clifford Chapin (English), Óscar Flores (Latin American Spanish)

Voiced by: Maaya Sakamoto (Japanese), Michelle Rojas (English), Carla Castañeda (Latin American Spanish)

Astronauts (unmarked Season 1 spoilers)

Voiced by: Keiji Fujiwara (season 1), Satoshi Mikami (season 3) (Japanese), Kent Williams (English), Héctor Estrada (Latin American Spanish)

Voiced by: Lynn (Japanese), Caitlin Glass (English), Laura Pitt-Pulford (singing voice), Miriam Aceves (Latin American Spanish)

Voiced by: Showtaro Morikubo (Japanese), Patrick Seitz (English), Fernando Moctezuma (Latin American Spanish)

Voiced by: Hisako Kanemoto (Japanese), Erica Mendez (English)

Voiced by: Kanehira Yamamoto (Japanese), Mike Pollock (English), Jorge Ornelas (Latin American Spanish)

Voiced by: Rie Tanaka (Japanese), Rachel Robinson (English)

America

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Index

Next