Full Name: Mechanical Cat-Beast "Yui-2.0" Age: 2 years since date of manufacture Gender: Female First person: I (polite) Height: 150cm Race: Mechanical Cat-Beast Personality: Basically friendly, but retains a distinct mechanical quality. Appearance: Eyes are LCD screens displaying blue pixelated pupils. Has iron-gray hair. Wears an outfit resembling a school uniform. Has cat ears and a tail, but they look mechanical; the tail has multiple ball joints. Voice has a slight electronic mix to it.

Full Name: Hoshino Inui Age: 19 Gender: Male First person: I (rough) Height: 189cm Race: Cat-Beast Personality: Taciturn and very blunt, but despite his scary appearance, he is an incredibly good person at heart. Appearance: Wears a navy blue cat-eared robe. Wears many rings on his fingers as a hobby. Has navy blue hair and golden eyes, with cat ears and a tail.

Full Name: Touka Kuraiba Age: 14 at the time she became a ghost Gender: Female First person: I (soft) Height: 130-175cm (size changes depending on emotions and mood) Race: Ghost Cat-Beast Personality: Very timid and shy around strangers. Appearance: Wears an oversized navy blue cat-eared hoodie with long sleeves and short pants. Her body is slightly translucent, and she always floats slightly while moving. Has light gray hair and white eyes, with cat ears and a tail. Has a surprising tongue piercing. Also has many ear piercings and two on her right eyebrow.