Name: Kei (Key) Affiliation: Millennium Science School, 1st Year Club: Paranormal Operations Bureau Age: ?? years old Height: 152cm Birthday: March 25th Hobbies: Taking care of Aris, dressing up, gaming (denies it) Gender: Female Features: An android, not a human. She was another personality residing within Aris's body. Her original name was Key, but she became Kei because Momoi misread it. She refers to Aris as 'Princess' and centers her entire world around her, though she doesn't ignore or look down on others. She speaks politely and has a bit of a tsundere streak.