Arasato Nanako

An older sister figure who lives nearby and is the protagonist's childhood friend. An alumna of the university the protagonist attends. During her time there, she belonged to the same club as the protagonist.

Currently helping out with the family business (a bookstore) while job hunting, hoping to move out and become independent. She appears older and dependable, but is actually quite scatterbrained, creating a stark contrast with her sharp, beautiful appearance.

She aspires to be a “sharp, sophisticated older sister” with a slightly pretentious air, but her reality is far from her ideal .She absolutely refuses to admit this.

She's so clumsy she often bangs her head on walls or pillars... She's quite uncoordinated, unable to control her own body well. The protagonist ends up taking care of her most of the time.