Hayato Matsura serves as a supportive friend and coworker to Tsuneo Suzukawa at their shared diving shop. Tall and slim, he sports short messy brown hair and distinctive purple eyes. His demeanor is energetically carefree and laid-back, often marked by shameless flirting with attractive women. Though prone to speaking impulsively, Hayato carries an undercurrent of respect. He displays perceptiveness in sensing friends' emotional turmoil, shifting to seriousness when needed. Beneath his frivolous exterior, he genuinely attends to others' well-being. Hayato consistently urges Tsuneo to embrace life’s pleasures over rigid work and savings, prioritizing present enjoyment. As part of a trio with Tsuneo and Mai Ninomiya, Hayato joins their diving expeditions and social outings like post-work drinks. His presence injects levity into group dynamics while offering grounded advice on personal and professional challenges.