Ai Enma (閻魔 あい, Enma Ai?)
Voiced by: Mamiko Noto (Japanese), Brina Palencia (English)
The main protagonist of the series, who is arguably an anti-heroine as well. With long, straight black layered hair with a fringe, ruby-red eyes and pale skin, she is a spiritual entity with a tragic past, who lives in a place frozen in time as it basks in eternal sunset, along with her grandmother. There are 4 dolls visible near the computer, which are her companions. With an old computer inside their house, Ai is able to receive the names of the clients who have used the website, and delivers their revenge. She normally wears a black sailor uniform, but always wears a black kimono with floral designs when delivering the vengeance of a client. Whenever a contract is fulfilled, after the targeted person suffers the hellish hallucinations which exploit their flaws and crimes, she appears to the condemned and recites the following rite, before rowing them to eternal damnation:
Yami ni madoishi awarena kage yo (闇に惑いし哀れ な影よ?, "Oh,pitiful shadow cloaked in darkness")