Diana

A Goddess that resides in Tenri she exhibits characteristics of a tsundere and pure maiden whenever she is in possession of Tenris body there is a halo above her head. She and her sistersso called Sisters of Jupitersacrificed themselves to seal the Old Hell. As a being from the heaven she requires the power of love to grow for it is the source of their energy. To obtain more power Diana asks Keima to marry Tenri. Source: Wikipedia