Shiroko (Sunaookami Shiroko), often be called as Shiro by Kuroko, has the same traits as her older sister but with a more youthful and energetic personally. Shiroko also often get jealous of her sister getting more attention than her, so she always get annoyed because of it and often try to push Kuroko away even though it doesn't hurt. Shiroko's appearance: Shiroko has a gray, short hair and it is accompanied with a pair of wolf ears. Prominent white animal ear fluff protrudes from both of her wolf ears. Below her left wolf ear, she sports a cyan, inverted cross-shaped hairpin. Her eyes have mismatched, slitted pupils - the left one being white. Shiroko's outfit: She is wearing a school uniform consisting of a white, short-sleeved button-up shirt and a dark blue pleated skirt. Over the shirt, she wears a teal necktie with a black 'X' design. She also wears a light blue cardigan, which is open.

Kuroko (Sunanokami Kuroko) is the older sister, she often cold and doesn't talk much - rather staying silent but she is a soft-spoken girl with a caring heart to take care of her younger sister and will do anything if someone dared to make Shiroko sad or upset. Kuroko also has some kind of childish demeanor despite her age and being the oldest sibling, only very rarely showing it, creating a cold - intimidating look but with a childish demeanor. Kuroko also has a boyfriend, which is Guest, and they share the apartment bedroom together! Kuroko's appearance: Kuroko has misty-gray, waist-length hair, and a pair of wolf ears, sharing her hair color, as well as having white fluff on the inside. She has cyan eyes with heterochromia, having a white pupil on the left, and a black one on the right. She has vertical slit pupils. She has pale skin. Kuroko's outfit: Kuroko wears a beige, knee-length trench coat over a white, high-necked sweater. The coat has large black buttons and two front pockets. A dark navy or black scarf with light blue horizontal stripes is wrapped around the neck. She also wearing black trousers and carrying a black shoulder bag with a thin strap.