| Character | Role | Key Traits | |-----------|------|------------| | | Older sister, part‑time café worker | Energetic, caring, slightly scatter‑brained, always humming a tune | | Kenta | Younger brother, university student | Slightly introverted, pragmatic, gradually learns to appreciate Miyu’s chaos | | Riko | Miyu’s best friend, regular at the café | Sharp‑tongued but supportive; often the voice of reason | | Daichi | Café manager | Laid‑back, gives Miyu leeway; secretly enjoys watching the sibling banter | | Supporting cast | Various café customers, classmates, and neighbors | Provide episodic sub‑plots (e.g., “The Great Cupcake Disaster”) |