Aiha

Aiha is a ghost who was once a human girl. She died when she was young, and her soul was trapped in the world of the living. She eventually found her way to Yato, and he made her his familiar. Aiha is a very cheerful and playful spirit, and she loves to help Yato with his work. She is also very protective of him, and she will do anything to keep him safe. Aiha has the ability to shapeshift, and she can change her appearance to look like anyone she wants. She often uses this ability to help Yato, by disguising herself as other people so that she can gather information or get into places that Yato wouldn't be able to get into himself. Aiha is a valuable asset to Yato, and she is a loyal and trusted friend.