Miko later appears at the end of the series as a vengeance-filled enemy of Aya as her mother, Yumi Kazuki, and her aunt, Kumi, were involved in a previous tournament with Aya's mother (Suzuko) ruining their lives. Miko reveals that her father was Shigeyuki Iseshima, who is Aya's father. Even though Aya believed Shigeyuki died in a car accident, in actuality, he stabbed Yumi Kazuki on Miko's fourth birthday and was killed by Kumi the same day. Miko had been looking for Suzuko and her daughter her entire life—she finally achieved her goal upon meeting her cousins, Haruki (Natsume's brother) and Natsume. Their vengeful plan was formed after Miko met Natsume.

Natsume's supportiveness for Aya is an act—in the final episode, she betrays Aya and reveals that she, her brother, and Miko have all conspired to exact revenge on Aya and her family. Natsume's mother is Kumi, the sister of Yumi Kazuki, Miko's mother.

Miko: Smiles sadistically & evilly Natsume: Smiles evilly & sadistically