Kusuha Mizuha radiates kindness and cheer, her empathy matched by a steadfast dedication to aiding others. She finds solace in long baths, amasses shopping catalogs, and crafts health drinks renowned for their healing potency yet reviled for their vile taste—provoking reactions from fainting to vehement refusal, though a rare few endure them. Driven by compassion, she aspires to become a nurse or health food entrepreneur, channeling her support through non-combat roles.

In one timeline, she shares a childhood bond with Ryusei Date, nurturing unspoken affection overshadowed by his obsession with mecha. When an attack at a tournament leaves her injured, she enlists in the Earth Federation Army’s medical division to remain near him. Her latent Psychodriver abilities soon surface, catapulting her into piloting the Grungust Type-2 under a mentor’s guidance—a figure who later manipulates her, forcing rescue by an ally.

Her combat legacy includes piloting the RyuKoOh and KoRyuOh alongside Brooklyn Luckfield, their fates interwoven with ancient mechanized entities. Together, they conquer memory loss, mind control, and manipulation, culminating in decisive clashes against alien threats. Their mecha evolve into the Shin RyuKoOh and Shin KoRyuOh, mirroring their resolve. Post-conflict, she resumes medical studies while maintaining military research ties.

In another continuity, she navigates covert operations and interteam dynamics, excelling in live exercises and clandestine missions. Captured during a public event, her imprisonment sparks a rescue operation. Subsequent missions see her defending ancient relics against power-hungry foes, showcasing adaptability across roles.

Throughout her journeys, Kusuha balances battlefield prowess with humanitarian ethos. Despite excelling in combat, she steadfastly champions healing, offering emotional solace and medical aid to allies. Her relationships span mentorships and rivalries, marked by trust forged through trials and reconciliations after betrayals.