Ninomiya Asako

About
Karin's best friend, they are so close in fact that they would marry if they were the opposite gender. She's also the daughter of Lieutenant Ninomiya, who knew  Karin's parents. She wants to be a prosecutor when she grows up.

Very strong-minded and not afraid of confrontation. Even goes so far as to confront Shura about him getting close to Karin as she felt he was a dangerous person.

She is the first person to give word that Karin has been kidnapped by Fenrir, seemingly having been allowed to live to tell Shura to come.

Later on it is revealed that she is actually Kudorusuchisu and the real Asako died 10 years prior. She was lured out and eaten by Kudorusuchisu. This was all for a plan to kidnap the young Karin and eat her as Shura comes to rescue the girl who looked like Shea. She was witnessed in the act by Karin's parents and she then also killed them. In order to salvage this plan, Deirdre cast a seal upon Kudorusuchisu which replaced her memories with that of Asako and sealed of her magic powers leaving her as a sort of sleeper agent. This seal would only be released after 5 of the 6 stars have died.

She was killed by Shura in the school's chapel.

Trivia

 * Not good with paranormal stuff.