A Goddess that resides in [Tenri](https://anilist.co/character/26275/Ayukawa-Tenri), she exhibits characteristics of a tsundere and pure maiden; whenever she is in possession of Tenri's body, there is a halo above her head.

She and her sisters—so called "Sisters of Jupiter"—sacrificed 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](https://anilist.co/character/13468/Katsuragi-Keima) to marry Tenri.

~!Later on in the manga it is revealed that she doesn't grow wings because she herself develops feelings for Keima.!~