Сакаґамі Чія

Yuzuka’s friend who deems Yuzuka as “most important friend” and truly cares about her; for example, she is on guard against Miton for the good of Yuzuka. She is usually emotionless and speaks in mono-tone voice. She can see and hear Miton, and has the aptitude of a magical girl; however, the limitation in Miton’s capacity prevents her from really becoming one. She is fascinated by Yuzaka’s status and figure as magical girl.

Source: Wikipedia