Gaku Yaotome, a 22-year-old idol born on August 16, towers at 183 cm with striking light gray hair and piercing eyes. He favors soba and films but recoils from illogical scenarios. Renowned for his razor-sharp wit and fiercely competitive streak, he despises defeat yet channels this intensity into an unwavering dedication to his craft. Debuting under his father’s entertainment empire, Gaku ascended rapidly, clinching titles like "No.1 male most want to be hugged by" and dominating commercials and dramas.

Adopted into affluence as a child, his youth fractured after a tragic accident injured his younger sister, prompting him to flee home. Music became his refuge, later anchoring him as a pivotal member of the idol group TRIGGER. His relentless pursuit of top-idol status masks a fear of inadequacy and yearning for validation, occasionally clashing with his struggle to reconcile public perfection with private authenticity.

In TRIGGER, Gaku shares a bond of mutual respect and camaraderie with Ten Kujo and Ryunosuke Tsunashi. He fiercely guards their collective identity, insisting on preserving their edgy aesthetic—evident when the trio embraced villain roles in a fairy tale-themed campaign to align with their bold image.

Behind his confident stage persona lies a heartfelt rapport with fans, showcased through sincere performances and candid stories. This blend of guarded toughness and unguarded vulnerability traces his evolution in reconciling fame’s demands with genuine human connection. Across his journey, he gradually confronts past wounds, refining his identity as an idol who melds ambition with introspection.