Tōma Taiga, a member of the HxEros Tokyo Branch, possesses an effeminate, androgynous appearance frequently misread as feminine. His delicate features include dirty blond hair, light brown eyes, and a slender frame. His H-gear incorporates a distinctive belt, paired with a choker reminiscent of a pet collar. A source of insecurity is his gynecomastia, which he discreetly masks with a towel during vulnerable moments like bathing to hide his prominent nipples.

Submissive and easily flustered, Tōma wrestles with doubts about his masculinity and physical traits, feeling overshadowed by assertive female teammates. This fuels his admiration for Retto Enjou, whom he idolizes as the epitome of a capable male hero. His earnest plea for Retto’s mentorship hints at deeper, undisclosed motivations tied to his personal journey.

Tōma’s H-energy generation hinges on an unusual quirk: he must passively observe others’ reactions to H-energy stimuli, complicating its accumulation. This mechanic mirrors his internal conflict between self-doubt and his duties. During a collaborative beach mission against alien threats, his persistent efforts to seek Retto’s advice underscore his resolve to grow beyond his insecurities.

His narrative centers on navigating fragile self-esteem, striving to belong within the team, and cautiously accepting his role as a hero despite persistent uncertainties.