First character designs of Senku and Taiju "At the planning stage, Taiju was the protagonist and Senku was a supporting character." — Boichi-sensei
First concept illustrations with inked line art, of Taiju and Senku for the Jump Serialization Meeting
"I gave Senku—the genius—a strong, hero-like hairstyle, while Taiju, as the protagonist, was designed more in my own style rather than a typical Jump hero: a relatively ordinary hairstyle, but with a muscular build. Because Taiju was the protagonist, I focused the emotional beats and close-up direction on him." — Boichi-sensei
"In my mind, the greatest heroine in Weekly Shonen Jump was Ai from Video Girl Ai, so I gave Yuzuriha a spiral-shaped hairband as a homage to that work. However, this element was not yet present in her initial design." — Boichi-sensei
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