Akihito Akiyama began as a human profoundly wounded by romantic rejection, leaving him emotionally drained and disillusioned with love. During this vulnerable period, he encountered Seri Kikiyou, a vampire equally weary of romance. They forged a connection rooted in mutual understanding, their deepening friendship complicated by Seri's unintentional flirtations, which ignited intense romantic feelings within Akihito. As Seri distanced herself, Akihito's mental state crumbled, manifesting obsessive behavior and stalking tendencies. This culminated in a life-threatening crisis where Seri attempted to kill him. Mediation by Kou Yamori and Nazuna Nanakusa helped Akihito and Seri mend their conflict and reconcile their feelings. Seeking permanence in their bond, Akihito requested and became Seri's vampire underling, completing his transformation. Pre-transformation, Akihito appeared tall and thin, marked by a mole under his right eye, black hair, and thick-framed glasses required for poor eyesight. He wore a buttoned white shirt with blue collar and sleeves, black pants, and brown shoes without socks, projecting an unassuming weariness. As a vampire, his eyesight perfected, rendering glasses functionally unnecessary, yet he retained them out of habit. His style evolved towards darker, looser attire—a dark blue shirt and black jacket—and he adopted two piercings in his left ear, projecting a cooler confidence. Akihito's personality centered on sensitivity and emotional fragility. Initial kindness and a philosophical outlook gave way to instability and obsession following romantic rejection and Seri's withdrawal. Post-transformation, core aspects persisted alongside heightened confidence and a potent thirst for blood; he often struggled to control urges to bite, especially those with existing marks. Residual human habits, like wearing glasses, became symbolic weaknesses. His defining relationship was with Seri Kikiyou. Their bond evolved from shared disillusionment to friendship, romantic tension, and eventual reconciliation. As her servant, Akihito prioritized forging new memories with Seri while discarding remnants of his human past. Significant connections include friendship with Kou Yamori, who aided during the conflict and nicknamed him "Menhera-san" or "Daru-otoko-san" for his instability. Allies Mahiru Seki and Hatsuka Suzushiro featured in his narrative, while Kyouko Mejiro became an adversary after attempting his life. As a vampire, Akihito gained immortality, levitation, phasing, superhuman speed, strength, durability, and accelerated regenerative healing—marking a definitive physical and existential shift. A notable detail involves his glasses: despite perfect post-transformation eyesight, Akihito continued wearing them habitually, an enduring carryover from his human life that inadvertently became a vulnerability. Akihito's story reflects a journey from emotional turmoil and obsession to a stabilized, transformed existence within the nocturnal world, anchored by his reconciled bond with Seri.