Hajime Gomi captains Fire Company M at Medaka-Ga-Hama Fire Station in Sengoku City. Outwardly unassuming with a quiet, easygoing manner, he habitually wears a cap hiding severe burn scars on his head—scars earned years prior rescuing a young Asahina Daigo from a house fire, an act where he inspired the boy by calling him a "little firefighter."

Gomi champions proactive fire prevention through daily, uncelebrated work. After his official shift, he patrols neighborhoods nightly, identifying fire hazards, educating residents on safety, and monitoring for unattended fires, a dedication directly linked to the unusually low fire incidence in Company M's area. His philosophy prioritizes saving lives above rigid procedure, demonstrated when he shielded Daigo from discipline after Daigo recklessly drove a pump truck through a building to save trapped colleagues; Gomi claimed responsibility, accepting suspension to protect Daigo’s career.

As Daigo's mentor, Gomi recognizes his raw rescue instincts but observes his initial lack of altruistic drive. He fosters Daigo’s growth by reframing firefighting's purpose, such as presenting letters from people Daigo saved to illustrate the human impact beyond the adrenaline of rescue. This guidance helps Daigo reconcile his thrill-seeking impulses with the profound responsibility of preserving life.

Gomi’s calm authority and emphasis on unseen preventive actions define Company M's operational culture, countering perceptions of their unit as underperforming. His consistent commitment safeguards the community through both dramatic emergencies and vigilant daily effort.