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)

Blue Seed: Ryouko Takeuchi

Ryouko is a member of the 'Terrestrial Administration Center' and a former police officer.  She has a crush on the TAC director Kunikida.