165 cm tall, large breasts, slim waist and full hips. Io is a very quiet girl, rarely showing any notable emotion regardless of the circumstances. However, she's shown to be very kind and caring towards anyone she would consider a friend. As a revenant, upon her first awakening, almost all semblance of memory was lost. Her memory loss and generally limited experience with the world makes her appear timid, yet despite this nature, she's shown to greatly care for others.