Kanna Hatano, a third-year Sakai Town Academy student, bears waist-length blue hair tied with a yellow headband and piercing blue eyes. Her surname, Hatano, evokes "wave," "many," and "from," while her given name, Kanna, fuses "god" with "Nara" or "apple tree." Born to a mother hinted to be Amanda, Kanna’s physiology defies time: she ages rapidly in youth but halts upon maturity, granting centuries of life. Orphaned early, poverty and isolation drove her to prostitution and near-suicide until Koudai and Keiko Arima intervened, recognizing her shared supernatural traits.

Her existence hinges on a necklace encasing crystallized Chou Nenshi, a life-sustaining super-soul stone. Discarding it once led to her temporary death, reversed only by Takuya Arima’s intervention. Guided by her mother’s warnings, she resists Geo Technics’ coastal construction, fearing unleashed supernatural forces beneath Sakai Town.

Bound to Takuya via Koudai’s cryptic message about eight jewels "opening a new path" and a study key, Kanna oscillates between emotional detachment and rapid intimacy, nearing engagement in some story routes. Conceived initially as a Rei Ayanami-esque younger sister, her final persona emerged aloof and enigmatic. Adaptations diverge: the original visual novel explores prostitution and a thwarted rape by a mind-controlled foe, while anime versions omit darker elements, introducing Mio Shimazu’s interactions.

Indifferent to nudity or social norms, her immortal maturity masks vulnerability. Alternate timelines like "Dera Grante" weave her into interdimensional clashes, temporary deaths, and revivals. Design revisions shift her accents from red to yellow and adjust her hairstyle between original and remake iterations. Her arcs culminate in bittersweet resolutions contingent on pivotal choices, framing her as both fragile and enduring within the story’s metaphysical tapestry.