Yubelluna

She serves as Riser Phenex's Queen in his peerage and is widely regarded as the strongest member of his group. She's nicknamed the "Bomb Queen" because of her powerful fire-based magic that creates massive, explosive impacts resembling bombs when it strikes.

In the story (particularly during the Rating Game between Riser and Rias Gremory's teams), she acts as a formidable opponent, using cunning tactics like sneak attacks and holding her own against strong fighters from the opposing side. She's fiercely loyal to Riser, obedient to his commands, and shows a more submissive side in his presence.

She's a reincarnated devil with a voluptuous appearance, featuring long wavy purple hair and matching eyes.