Wolf Girl & Black Prince: Reika Sata, Mayu, Miho, and Ryouko.

 

Reika Sata is the older sister of Kyoya.  She has a similar pessimistic and cynical personality as her younger brother.  After their parents divorced she went to live with her mother while her brother lived with their father.

Mayu, Miho, and Ryouko are three girls who were invited by Nozomi to try and get Kyoya to return to his playboy ways. They appear in episode 9.

(Mayu)

(Miho)

(Ryouko)

Wolf Girl and Black Prince: Hitomi Sata

 Hitomi is the divorced mother of Kyoya and Reika.  She has a good natured and fun loving personality; but dose go through a personality change when she is drinking.  Only Reika lives with her and she feels guilty that she let her ex-husband take Kyoya.