Kouran stands as one of six queen candidates chosen by the sacred Bokka ritual to potentially rule ancient Yamatai, her divine connection manifesting through a power-infused armband. Her striking appearance features vibrant red hair tied in pigtails and piercing violet eyes. She exhibits a distinctly playful and theatrical personality, often embracing childlike impulsiveness and a seemingly simple-minded outlook. Yet, beneath this exterior lies a capacity for sharp seriousness when decisive action is required. Her primary strength resides in formidable martial arts expertise, augmented by natural acrobatic prowess. While lacking overt supernatural abilities, her combat skills make her a potent asset.

When the kingdom of Kune invaded Yamatai, scattering the candidates, Kouran fled with her close companion and fellow candidate, Tadami, seeking refuge on a distant continent—a move revealing her practical survival instincts. After reuniting with the other candidates, she actively contributes to the resistance against Kune's occupation. Within the group, her expressive nature frequently provides moments of levity, yet her commitment to Yamatai's liberation alongside her peers remains unwavering.