Hanako Migiwa is a third-grade elementary student. She sports black hair in two braids tied with pink ribbons and straight-cut bangs featuring a central indent. Her physical traits include noticeably fuller cheeks, a prominent chin, thicker lips than her female classmates, and identifiable blue rectangular glasses. Her typical outfit consists of a light pink long-sleeved shirt with a white lacy collar, a darker pink ribbon tied beneath it, matching lacy cuffs, a light blue skirt, white socks, and pink shoes.

Her personality frequently exhibits a feminine, girly demeanor, often expressing well-intentioned behavior as female class president. This girlishness intensifies significantly around topics related to her classmate Kazuhiko Hanawa, for whom she harbors a significant infatuation. She is moody, easily provoked to anger or sadness when other girls approach Hanawa or when she faces mockery. Hanako is observant and willing to assist friends and family.

As class president, she maintains classroom conduct and ensures classmates complete tasks. She displays a mature disposition with younger children, remaining calm and helpful during incidents like a child wetting themselves, guiding them while classmates panic. Her hobbies include fantasizing and daydreaming about a relationship with Hanawa, often visualizing scenarios where she is treated as a bride or princess. She practices kendo and studies ballet, and her favorite foods are spaghetti and apple pies.

Her relationship with Hanawa is marked by passionate affection and aggressive protectiveness. She becomes visibly happy with his kind interactions but reacts angrily to other girls attempting closeness. Her most prized possession is a photo of herself with Hanawa taken during Sports Day. She lives with her mother and owns a pet English bulldog named Amaryllis.