Sapphire operates as a member of the Divas within the secret organization Goma under D.D.'s command. Her core mission targets the elimination of the three emperors using abilities rivaling their own. In combat, she dons magical girl-inspired attire and commands fire, earning the epithet "Crimson" for her flame affinity and volatile temperament. This elemental control enables her to launch projectiles that combust on impact.

Her personality displays overt sadistic and masochistic tendencies. She actively tries to convince Hina Mitsurugi that death embodies beauty and pleasure rather than tragedy. Sapphire expresses explicit romantic and sexual attraction toward women, harboring a specific obsession with Hina and a desire to dominate her.

Relationships among the Divas vary sharply: she shares a seemingly affectionate bond with Deene, the wind-element Diva, but radiates intense hatred toward Pixis, with their exchanges marked by mutual contempt.

Physically, Sapphire has dark red hair and heterochromatic eyes—one blue, one green—consistently concealing her functional left eye beneath an eyepatch. Outside Goma's headquarters, she is often accompanied by her two hellhound-like canine companions, Kugura and Shigura.

In combat, she engages protagonists directly, specifically challenging the inexperienced Dangaizer pilot Hina Mitsurugi during their initial confrontations.