Taiju Ooki  

, 大木 大樹

Taiju is a friend of Senku and has romantic feelings for Yuzuriha. He possesses a robust physique and assists Senku in hunting and transporting heavy objects. Despite being energetic even about minor tasks, Taiju frequently screams loudly. Unlike fighting, he prefers to obstruct his opponents' attacks rather than engaging in combat himself. Prior to the world turning into stone, Taiju intended to express his feelings to Yuzuriha after five years of hesitation; however, as he was turned to stone, he relied on his unwavering resolve to persevere since he had been unable to convey his emotions earlier.