Hana is a former drag queen and performer who lives as a homeless woman in Tokyo. She was abandoned by her parents as an infant and grew up in a series of foster homes and institutions before being taken in by Mother, an older drag queen who ran a bar and became her surrogate parent. Hana worked at Mother's bar as a singer until a violent altercation with a rude customer forced her to leave. She later entered a serious relationship with a man named Ken, but after he died from an accidental fall, Hana was overcome with grief and became homeless, eventually meeting her companions Gin and Miyuki.

Hana has a tall, broad-shouldered frame with dark brown hair, brown eyes, and fair skin that shows the wear of life on the streets. She typically wears a high-necked dark dress beneath a long cardigan and a distinctive yellow shawl, with trousers, leg warmers, and fingerless gloves, accessorized with earrings and red makeup. Her time living rough has taken a serious toll on her health, leading to issues stemming from poor nutrition that sometimes manifest in violent coughing fits.

Her personality is defined by a deep, nurturing warmth and a theatrical sense of drama. Hana is the emotional core of her found family, possessing a caring and motherly disposition that she extends especially toward abandoned children and her younger companion, Miyuki. She can be melodramatic and prone to tears when sad subjects arise, but this is balanced by a genuine, loving nature and the ability to be serious when the moment demands it. She has a habit of putting others' happiness before her own well-being, once comparing herself to the blue demon from a folktale who sacrifices itself to bring joy to another. Despite her difficult circumstances, she carries herself with a sense of poetic grace, frequently composing haiku on the spot and appreciating literature, including the works of Dostoevsky.

Hana identifies as a woman; she articulates this by saying that God made a mistake by placing her in a male body, as in her heart she has always been female. She uses feminine pronouns for herself and describes as an okama, a Japanese term that can refer to gay men or trans women. Her deepest motivation is the desire to be a mother, a role that biological circumstances have denied her. This longing is the driving force behind her actions throughout the story. When she and her companions discover an abandoned baby in a dumpster on Christmas Eve, Hana is the first to insist on caring for the child, whom she names Kiyoko, seeing the infant not as a burden but as a divine gift. She becomes the most determined member of the group to find the baby's parents, not out of a desire to return the child quickly, but because she believes in second chances and wants to understand why someone would abandon what she sees as a priceless treasure. Her Christian faith, which she practices devoutly even as a homeless person, reinforces this hopeful worldview.

Hana's key relationships are with her two fellow homeless companions. She harbors unrequited romantic feelings for Gin, a middle-aged former bicycle shop owner whose gambling debts led him to abandon his family. While Gin does not return her affection, the three share a deep, practical bond as a surrogate family who look out for one another. Hana also acts as a maternal figure to Miyuki, a teenage runaway who stabbed her father. Hana takes her responsibility toward the girl seriously, encouraging her to continue her education by providing books and trying to show her that she is loved and valued.

Over the course of the story, Hana undergoes significant development. Her initial fantasy of keeping Kiyoko for herself evolves into a more selfless understanding of parenthood and sacrifice. Facing her own fragile health and the many dangers of Tokyo on Christmas night, she repeatedly puts herself at risk to protect the baby and, in doing so, confronts the pain of her own abandonment and loss. By the end, her role shifts from someone longing for a family to someone who actively creates and sustains one, demonstrating that motherhood and love are defined by action and care rather than by biology. Her notable abilities include a talent for singing, improvisational haiku composition, and an almost superhuman emotional resilience that allows her to find hope and humor even in the direst situations, inspiring those around her to persevere.