Yae Miko is the head maiden of the Narukami Shrine. She's a close friend of Ei,the electro archon. One day, Mike receives a last 'gift' from Ei before Ei locks herself in her realm. The 'gift' is a basket where there's a baby boy inside. He's Ei's son, Kunikuzushi, and a letter where Ei asks Miko to take care of him because it's too dangerous for him to stay with Ei