Masamune Habutae serves as the Human Analyst in Kura’s Wellside division, leveraging the Mizuhanome system to investigate criminal minds. Tasked with identifying individuals within id wells—mental constructs extracted from serial killers’ subconscious—he collaborates with investigators such as Sakaido and analysts like Kazuo Wakashika to decode these virtual landscapes.

His appearance features spiky black hair and brown eyes, complemented by a signature black suit, light pink shirt, and dark pink tie. During Tsukimaru Nishimura’s funeral, he adopts a somber black suit, white shirt, and black tie, mirroring the occasion’s gravity.

Professionally focused yet occasionally amused, Habutae balances detachment with empathy. He dryly acknowledges Kura’s surreal technology and proposes nuanced motives, such as altruism behind Nahoshi Inami’s id well, while expressing unease toward Miyo Hijiriido’s directness. Though less emotionally driven than Wakashika, his insights remain pivotal.

Having joined Kura six months prior to the central events, his contributions anchor Wellside operations. His name, derived from Japanese kanji, reflects layered meanings: “Masamune” (正宗) signifies “proper essence,” while “Habutae” (羽二重) evokes multilayered feathers.