Gen Asagiri/Synopsis

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Prior to the events of Dr. Stone, Gen Asagiri was a famous mentalist making a debut on TV before he was encased in stone for thousands of years.

He met Tsukasa during an appearance on a psychological magic show.

Plot

Kingdom of Science Arc

He was de-petrified in the year 5739 by Tsukasa. Disoriented, he inquires to himself whether this is a camera prank, berating his manager for not preventing it. He is surprised to to find Tsukasa standing right before him, recalling he knows him from the magic show. He informs Gen that thousands of years have passed and what is before him is a pile of petrified humans who he deems should be revived first. He then tells Gen he revived him for his usefulness, in order to give him a job - tracking down Senku. Asagiri was initially introduced as Tsukasa's spy, sent to find Senku and report back if he was dead.

Gen subtly made his way in the village and ate ramen, before revealing his familiarity with Cola. Senku realized from this that he is a modern person, as Kohaku surrounded him with Kinro and Ginro. Senku then recalled him and he revealed his name. Gen revealed his mission after Senku made him work to pay off his gift of ramen. However, Senku's progress at creating iron and plans of making a generator, impressed Gen and prompted him an offer to lie about it and allow Senku to fall under his radar once again.

Gen stuck around Ishigami Village for some time after this, pondering over whether or not to join Senku against Tsukasa or stay with the Empire of Might. He scales his benefits on staying with Tsukasa, meaning working much easier and having a harem. He then compares it to Senku who looks for hard work but creates more and more modern products like ramen, still stating he leans towards his allegiance with Tsukasa. Suika asks Gen what a harem is, a flustered Gen telling her she's better off not knowing yet.

An angered Kohaku threatens to kill Gen due to his rotten nature, as Senku stops her and warns her that Gen not coming back to Tsukasa would prompt the latter to come check up on him. He assures Gen that what he will make will certainly place him into Senku's team. Gen inquires what the next invention will be and Senku replies that he will make a power station, much to Gen's shock. A storm comes, and Gen asks Senku whether he's making a lightning generator. Senku says such thing doesn't exist, and that he is planning on collecting lightning in order to make a magnet a power generator instead.

Carbo frighteningly asks whether the cause of lightning was the sorcerers, meaning Senku and Gen. Magma offers to kill Senku himself, and as he approaches, Gen surprises the latter and Carbo with flowers bursting out of his sleeves in an effort to fascinate the villagers with his skills in magic. He then uses a backpalm technique in order to instantly hide the flowers, drawing the villagers's attention once again. The atmosphere is interrupted by a bolt of lightning striking Kinro's spear.

Gen is in shock when he finds out Senku plans on making an electricity generator, but isn't surprised when Senku says it will be manually powered. Shortly after, Gen manipulates Kinro and Ginro into powering the generators, saying that with electricity, things like silver and golden spears shouldn't be an issue to repair. Having acquired manual-powered electricty, Gen bears witness to the creation of of light by Senku through a roasted bamboo fiber.

However, in his anger at the "sorcerer" in the village and due to mistaking him for Senku, Magma assaults Asagiri and impales him with his spear, with Gen only surviving due to the bags of fake blood hidden under his clothes, in preparation of an attack. In his condition, he asks Senku if he can make him cola, one of the things he misses from the past, and is put out of commission. Once Senku agrees to this, Gen is happy. Gen is shown reporting back to Tsukasa, lying about Senku's survival.

Village Games Arc

Before interfering with the fight, Gen is seen commenting on Chrome's state after being overwhelmed by Magma.Soon after, after asking how much time Chrome needs to ignite Magma's clothes with lenses; he joins the spectators and interferes with the match, shocking both Mantle and Magma who thought he was dead. Gen claims he used sorcery in order to stay alive, and then does a magic trick with flowers and makes up a lie that he cast a spell on Magma that will kill him should he move even for a step. Magma tries to blame sorcery as interference from a third party, trying to disqualify Gen at first. This is rebuked by Senku who says it could simply be a bluff and therefore obsolete, but that's on Magma to verify if he truly believes it.

Gen then orders Chrome to beat Magma before he "runs out of energy", prompting Chrome to notice his acting and reciprocate by saying he's weak and isn't able to do it. This empowers Magma to continue his bragging and celebration of victory. Gen thinks to himself that Magma was his to manipulate from the start; he deduced Magma was still tired from his fight with Kinro and that he needed rest anyway, therefore finding Gen's threat as a justification to rest - being vain and corrupted Magma is ready to justify even the most suspicious of lies if it suits him. Together with Chrome, he ignites Magma's clothes and effectively eliminates him from competition.

At the games' end, once it's certain that the Kingdom of Science will win the leadership of the village, Gen states that it's his time to leave; considering the ever faithful to the rules Kinro won't agree with him staying inside. Kinro gets reminded of this and notices he got wrapped up in the village games so much that he wasn't even aware of it. On his way out, he remarks on Ginro's behavior, saying that he's the type of guy to goad someone into competing together, then leave them in the dust once the match begins.

When the group consolidates after their win in the village bout, Kaseki shows them his new creation, a spinning waterfall bamboo. When asked by Gen about its utility, Kaseki states he has no idea what it could be used for. After Senku tells Kaseki to look forward to tomorrow and leaves along with the rest, the latter orders Gen to watch his creation with him so he doesn't get lonely. Gen protests and accidentally rips the clothes of the old man who grabbed him beforehand, revealing his pronounced physique. Now startled, Gen agrees to watch over the spinning bamboo.

Gen further inspects Kaseki's creation and discovers that it's used for carbonic acid - reminding him what Senku promised earlier. He approaches Senku to ask him what it's gonna be used for only to find him and Chrome in wreckage. Senku explains the chemical cascade that occurred with Gen fascinated how Senku could even say it without tripping over his words. Mentioning carbonic acid, Senku states it's going to be used in the making of baking soda, much to Gen's disappointment. Once the group wraps up the cure for Ruri, Senku tells Gen to stay in the lab as he can't get into the village. What's waiting there for him is in fact cola that he asked for. He smiles in happiness and gladly drinks the gift Senku left for him.

Village Origins Arc

The villagers offer Gen alcohol to drink in celebration of a new chief, which Gen refuses, saying that he has an important message to convey. Once Senku is back, the mentalist informs him Tsukasa's army is coming.

Vs. Hyoga Arc

Gen reveals that he volunteered to go first and ready for the attack. He also tells them that there is a man named Hyoga who was recently revived and he is just a threat as Tsukasa and they would be doomed. Surely enough, Hyoga would appear as leader of the assault. Using Magma's strength, Gen tricks the Empire of Might into running after Senku created a rifle.

He manipulates Hyoga's men into attacking during a storm, aligned with the trickery that Kingdom of Science possesses gunpowder. Once Hyoga is called out on inefficiency of his battle prowess without his spear by his warriors, Gen seizes the opportunity to "inspect" Hyoga's spear, being threatened to let go of it immediately by the latter. Once his plans get inevitably busted by Hyoga as his spear gets broken since the mentalist tampered with it, Gen officially deserts Tsukasa's society and joins the Kingdom of Science.

Gen worries about the incoming attack with the full force of the enemy's army, while Senku assures him with the option of a preemptive strike instead. The scientist promises the Kingdom of Science a new invention that will allow them to do so.

Communications Arc

Gen laments on Kingdom of Science's lack of firepower and Tsukasa's growing army. He is shocked to find out that Senku plans on craftin a cellphone since communication is vital to overcome the difference in manpower and intentionally less the amount of casualties during the war between two groups. He later helps in crafting a cellphone and is pleased with the cotton candy machine being built as a test. He gives Senku knowledge on Homura after he asks.

He conspires with Ishigami Village to create a telescope for Senku's birthday. After Senku returns, they show him the present and Gen admits from the time he saw Senku's drawing of the day he awoke carved on a tree, he respected him for his intellect and determination. Gen is pleased with Senku accepting the gift.

Gen is present when Senku discovers Byakuya left a record for him. After the record player is made, Gen is amazed to hear the voice of Senku's father and the song by Lillian Weinberg.

He attempts to convince Tsukasa Empire members to defect using a Lillian Weinberg impression. After defecting, Nikki, a Lillian Weinberg fan, decides to coach him to improve his performance.

Age of Exploration Arc

He and Senku scam Ryusui out of a lot of money. He and Ryusui manage to barter depetrification formula from Minami, in trade for cameras. 

Gen officially becomes recognized as the Kingdom of Science's Five Wise Generals.

During a test run on a motorboat, Gen and the others receive a transmission from an unknown person.

Treasure Island Arc

He is one of the only Perseus members not to be petrified, since he and the others were on the island.

Later on, he and the others work to better Kohaku for her to enter the Head's harem. He is later tasked with getting Mozu to ally with the Kingdom of Science and successfully manipulates to latter into siding with them. Afterwards, he is praised by allies for his actions.

Gen was petrified by Ibara along with the whole island except Senku. Gen was later freed by Senku and celebrated their victory.

However, his joy is short-lived when the Whyman attempts to use the Petrification weapon.

New America City Arc

Gen is worried when Senku announces plan to go to the moon. He later watches a petrified human who is revealed to be a warrior named Matsukaze.

He is present at Tsukasa's revival and is pleased to see him awake.

When the mentions of Senku's residual scars are made, Gen used paint to recreate his scar. He states it will serve as symbol, declaring the day he removes will be when the threat is vanquished. This rallies every other modern timer, who do the same and Gen convinces Tsukasa to do the same.

Sometime later he has approached by Tsukasa who brings up how Gen once betrayed him and states he regretted his revival but now sees it was the right choice.

After Senku and Ryusui reach a disagreement on what course they should take, Gen sides with Ryusui because of the dangerous path Senku has in mind. To settle this, they recreate poker and Gen is on Ryusui's side but Senku accuses him of going to cheat, but Kohaku enters the game. Gen is worried, as her actions prevent him from trying to cheat.

Ultimately, Senku wins the game and his course is chosen.

Gen is pleased when the crew have fun in the bar. He is ecstatic at receiving a cola.

Gen is present when Senku and Ryusui describe traveling the seas in ancient days. He questions how GPS works in the Stone World, as Senku explains with help from those in Japan. When a storm hits, Gen berates Senku's poor luck but Chrome creates a sunstone to better travel. Gen is amazed that it can actually help them. Very soon, he is excited when land is spotted.

When they reach San Francisco, Gen sees the statues of others lined up. He sadly discusses his hope that the lie he fabricated for the fake Lillian had been true: that America had recovered from the petrification, or beaten it altogether. Very soon, the crew of the Perseus separates with the warrior team following the exploration team in the case of an attack. While passing through the river, the group wonder about the corn since it's about the time where it would wither. Gen states America is vast and they may not find any. Soon the Mobile lab is attacked by alligators something Gen chalks up to Senku's bad luck and panics. However, he is in awe at the Warriors being eager for a challenge and driven by their hunger they attacked most of the beast well the rest flee in fear. Afterwards, François makes burgers out of the dead alligators to feed the crew, something Gen was happy on.

They continue to find corn that has been scattered through the river. That night, the crew set camp before Tsukasa and the others note on an eerie feeling. Soon Tsukasa alerts everyone to retreat inside the boat, where they could take cover. Surely enough, bullets rain down and everyone ducks for cover. After the gun stops shooting, Ryusui has the group enter the boats before fleeing the scene. Once at a safe distance, a panicking Gen notes on the events, wondering if America really survived but Ryusui brings up the statues. Gen hears Ukyo brings up the plausible cause of someone reviving on their own like Senku. A gleeful Senku notes they should be grateful because they did the grunt work. However, he notes if the person is a scientist then that person is finished because he won't lose in his strongest field.

After the Kingdom escape on the river, Gen is stunned to see an aircraft and panics as the enemy surely wants them dead before watching Senku have Kirisame bring it down. Gen is not surprised when Senku and Ryusui decide to procure the plane, as Senku had the look on his face.

When Senku announced plans to track the enemy, a worried Gen wondered who will be selected for this endeavor before he is picked along with Kohaku and Chrome, to his dismay. Gen bemoans this before he realized the enemy is drawing his group in and feels insulted at being underestimated. Now driven, he tells Kohaku and Chrome to stand back while he goes off but not before leaving a trail behind. He wanders the forest before the enemy appears and he quickly surrendered when a weapon was pointed at him. The enemy proceeded to check Gen but found no weapons and realizes he is not one of the warriors he saw from before. The soldier questions who Gen before Gen reveals he is magician and has Gen follow him. During the trip, Gen learns the soldier had been following his group, since the Alligator hunt and was planning to snuff out his allies sooner but now wants to interrogate Gen for what his colony is. Gen is led to the American base, where he is amazed by its development and finds the corn field and landing strip. Gen is led to a factory, where he is put onto something and meets the American scientist Dr. Xeno who introduced the soldier as Stanley Snyder before intently questioning Gen on who he is and where he came from. Gen gives his name and some of his history, though withholds his status as a mentalist. As Xeno is fascinated to hear that the man comes from Japan, Gen realizes what he is placed into resembles a polygraph test and decides to use his mentalist tactics. Gen describes his leader's behavior, Xeno makes a point that the stranger may either be honest to a fault or a very good liar. He doesn't mind however, saying that he is fond of both types and Stanley resolves to eliminate his colony's scientist, to Gen's worry. At the end, Xeno inquires on the leader scientist's name, knowing Senku would be easily eliminated Gen thinks of someone stronger and replies with "Dr. Taiju".