Mistress Vaness of the Celestial Clan stands as a silver-haired elder with piercing black eyes and delicate short wings, her stature small yet commanding within the Sky Temple’s celestial hierarchy. Clad in a violet robe over a purple dress, she embodies her clan’s ethereal aesthetic while overseeing the sealed Indura demon. When Meliodas arrives, his resemblance to the fugitive Solaad startles her, particularly his wingless form. Her stern authority softens upon encountering Hawk, whom she shelters and nourishes, weaving tales of the legendary Great Oshiro—the Celestial hero who imprisoned the Indura millennia ago. A fleeting celestial illusion sparks her belief that Hawk might carry Oshiro’s lineage, though this hope fades with clarity.

Amid the Six Knights of Black’s assault, Vaness clashes with Derocchio, hurling Ark’s purifying light to counter his darkness, only to retreat when her assault falters. Regrouping with Solaad, Zoria, and Ellatt, she resists Meliodas’s demonic ties but yields to Solaad’s trust, joining forces with the Seven Deadly Sins. In the final struggle, she channels her Ark alongside Elizabeth and fellow Celestials to fortify the seal on Baruja, the Indura’s vessel.

Victory leaves her contemplative, acknowledging outsiders’ unexpected role in defying the Indura—a revelation that challenges her clan’s reverence for Oshiro alone. Her actions throughout reflect unwavering loyalty to Celestial traditions, a guarded wariness of outsiders, and a pragmatic resolve to protect her realm, even through uneasy alliances. Beyond these events, her history remains unchronicled in known records.