Yuuna is a ghost with the appearance of a high school girl with long white hair and red eyes. She's seen wearing a hot spring yukata with grey detail and a red haori. Her clothes are a part of her spiritual body, so she can change their appearance at will. Being a ghost, she wears a sankaku no shiroi nuno (the triangular-shaped white cloth) and has a blue wisp over her head. Yuuna is shown to be a nice, modest, and kindhearted girl, she gets embarrassed easily. Yuuna is usually timid and humble.