Taiju Oki

About Taiju Oki

Taiju Oki is Senku's best friend, a powerhouse of stamina and sincerity who stayed conscious in stone for 3,700 years by sheer devotion to Yuzuriha, the girl he was about to confess to when the light came. Taiju is the Kingdom's engine: endless labour, endless courage, and a refusal to kill anyone, ever. His heart is the reason Senku's science matters.

Appearance

Taiju is a big, powerfully built 189 cm with spiky dark brown hair, thick eyebrows and an earnest, open face that shows every feeling at full volume. A petrification scar crosses his forehead. In the stone world he wears simple handmade clothes that rarely survive his work, hauling, chopping, running and digging for hours without tiring. His whole presence is warmth and momentum: when Taiju charges into a task, he does it shouting, sweating and grinning, and everyone else's workload somehow feels lighter.

Personality

Taiju is simple in the way bedrock is simple: loyal, kind and impossible to move once he has decided something matters. He is not stupid, he knows Senku is the brain, but his emotional intelligence is its own genius; he trusts completely, forgives easily and protects everyone, including enemies. His defining vow is that he will never kill, no matter the stakes, and he keeps it even when it costs him. His love for Yuzuriha, which he was seconds from confessing when the light came, survived 3,700 years of darkness without dimming, Taiju's heart is the Kingdom's foundation.

Background & Story

Taiju was an ordinary, energetic high-schooler whose best friend was the science prodigy Senku. On the day he finally resolved to confess his feelings to Yuzuriha Ogawa under the camphor tree, the petrification light swept the world. Taiju stayed awake in the stone, holding onto that unfinished confession, until the stone cracked 3,700 years later. Reunited with Senku, who had revived months earlier, Taiju became the Kingdom of Science's first labour force and its moral centre: gathering, building, defending, and carrying out missions, including infiltrating Tsukasa's empire, where his strength and his absolute refusal to take a life made him both invaluable and unbreakable.

Powers & Abilities

• Superhuman Stamina: Taiju can work, run and fight for extreme lengths of time without tiring, Senku treats his endurance as a power source in itself.
• Raw Strength: His physical power lets him haul, dig and build at a pace no one else in the Kingdom can match, and withstand blows from fighters like Tsukasa.
• Unbreakable Resolve: He stayed conscious for 3,700 years of petrification through sheer devotion, and he holds his no-killing vow under any pressure.

Key Relationships

• Senku Ishigami: His best friend since childhood, Taiju supplies the muscle and heart for Senku's plans without ever questioning the goal.
• Yuzuriha Ogawa: The girl he has loved for 3,700 years, his unfinished confession is one of the series' emotional anchors.
• Tsukasa Shishio: The fighter Taiju faced without ever trying to kill him, his refusal to take a life defines their clash of values.

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