Kanade: She’s very weak-willed and has trouble expressing her opinions, resulting in her getting pushed around by her sister. Despite the she receives from her sister, she is dependent on her, and almost seems to prefer being dominated by her. Still, she possesses a hidden strength

Hibiki: She cares about her sister, Kanade, but often treats her harshly due to her “older sister” complex. Furthermore, she may also harbor some feelings of jealousy and inferiority towards her twin. Hibiki always claims that the way she treats her sister is a joke, but does Kanade feel the same way...?