Kazuha Migiwa, daughter of an influential magnate, resides with her parents within the affluent Migiwa Residence. Trained rigorously from a young age in traditional arts like viola, flower arranging, and dance, her upbringing reflects a cultured lifestyle akin to modern aristocracy. Frequent parental absences fostered early self-sufficiency and independence, yet she carries no sense of superiority over others. Her demeanor blends sharp observation with modesty and cooperation, often prioritizing others' needs. Physically, she possesses long black hair cut in square bangs and typically adorned with a white ribbon, dark blue or purple eyes, and a refined appearance that belies her gentle nature. She stands 164 cm tall, born August 3 with blood type A. Childhood social isolation, stemming from her family's prominence in the village, eased only after befriending Akira Amatsume. Their bond deepened despite societal barriers. Kazuha later discovered Akira was her illegitimate half-sister through their shared father. This revelation followed her mother's refusal to adopt Akira after her mother's death, threatening separation should Kazuha's father officially acknowledge Akira. Consequently, Kazuha harbors resentment toward her father and concealed guilt over Akira's hardships, intensifying her protective instincts. She consistently monitors Akira's well-being, actions like applying sunscreen or providing transportation sometimes misinterpreted as romantic interest. Her story intertwines with Haruka Kasugano. After he overheard her call Akira "Onee-chan," she clarified their familial relationship, confiding her frustration with her father's secrecy about financially supporting Akira. Romantic feelings for Haruka blossomed during their interactions, culminating in a mutual acknowledgment of affection on a date. However, when Akira collapsed from exhaustion, Kazuha blamed herself for neglecting her sister due to the new relationship. Akira later confronted her about misplaced guilt, triggering a depressive episode as Kazuha reassessed her motivations. Resolution came during a village festival where Haruka revealed her father's clandestine support for Akira. Witnessing his genuine praise for Akira, Kazuha reconciled her misjudgments, relinquishing codependent tendencies to pursue a committed relationship with Haruka. In alternate storylines, like Akira's route, Kazuha participated in a DNA test investigating infant-switching rumors; results confirmed their non-maternal biological link. She later delivered these results alongside a recovered pendant symbolizing maternal connection, facilitating Akira's emotional closure. Her involvement in other arcs is peripheral, such as facilitating a pool-related encounter between Haruka and Nao Yorihime. Her viola playing symbolizes emotional expression, reserved for cherished individuals rather than public performance. Her surname means "water's edge" and her given name translates to "one leaf." She is the sole character depicted in a kimono within the original visual novel, and her narrative route initiated the anime adaptation's storyline sequence.