Kougyoku Ren 練紅玉

Kougyoku Ren is the Kou Empire's eighth Princess. Kougyoku is a Dungeon Capturer and owner of the Djinn, Vinea.

Kougyoku is a very willful person. She tends to act childish, but she can become serious if the situation calls for it. Even though she puts up such a willful front, she is actually a very lonely person and wants friends. She doesn't want to do everything ordered by the Kou Empire but is scared to disobey the orders.

Her name means "red jewel".