Akutsu, the protagonist’s trusted confidant, balances a quiet, introspective nature with the commanding presence of a school judo club captain. His disciplined leadership enforces rigorous training standards and competitive focus, underscoring a pragmatic dedication to his role. Though socially aloof, he reveals deeper empathy through subtle gestures—like discreetly urging Yasuhiro to monitor the protagonist’s safety—blending stoic restraint with proactive loyalty.

Keenly perceptive, he deciphers unspoken tensions in the protagonist’s romantic life, offering candid yet guarded advice that cements his role as a discreet anchor. While his blunt communication shuts down trivial interactions, it also reflects unwavering honesty. A spin-off storyline expands his arc when a collision with Murakami, a fellow judo competitor, sparks an unexpected connection. Strategically feigning injury after their accidental encounter, he cultivates a relationship marked by gradual mutual interest.

Throughout narratives, his steadfast composure and quiet support stabilize those around him, mediating conflicts and fostering growth through actions rather than words, all while maintaining an impassive exterior that belies his investment in others’ lives.