Isaka is a minor antagonist in Corpse Princess. He's one of the members of The Seven Stars.
Isaka is a Shikabane that resembles an old man.
Not much is known about Isaka's past. All is known about him is that he has the ability to create barriers. He, along with Toya were killed off by four of the Shikabane Himes at the end of the season.