Hana Matsuzaka is a shy high school girl distinguished by her curly blonde hair, a feature causing self-consciousness that prompts her to apologize whenever someone accidentally tangles their fingers in it. She wishes to befriend classmate Mayu Morita but finds approaching Mayu difficult due to Mayu's intense, straight-eyed stare and the concentrated aura Mayu projects during deep thought, which Hana perceives as intimidatingly soulless.

Her family life involves recurring domestic conflicts, primarily between her mother and grandmother, creating an unstable home environment. This tension leads Hana to voice darker expressions of frustration and sadness when reminded of these struggles, including openly acknowledging parallels between her reality and classmates' jokes about broken families.

Socially, Hana occasionally displays a reserved, unhappy demeanor, especially when topics touch on her household. Her interactions with peers, particularly Mayu, often involve misunderstandings rooted in her timidity and Mayu's reticence. Despite these challenges, she participates in group activities like festivals and casual outings with classmates.