Crestia Bell

She is the chief interrogator and executioner for the Church Investigation Commission who came into the human realm from Ente Isla to check on reports about Emis alliance with Maou. Unknown to Maou who she is she becomes his next door neighbor and eventually became close being a good cook she would drop by in Maous apartment to prepare meals for everyone. She knows little about the human realm especially in Tokyo that she is having difficulty going around the city and understanding peoples sense of fashion. Source: Animefreak