Riser Phenex  

, ライザー・フェニックス

The third son from the esteemed Phenex family, known in Hell as one of its most respected households, was supposed to marry Rias through an arranged union between their families, the Gremory and Phenex. However, Issei disagreed with this arrangement and challenged him to a battle instead. During the fight, Issei was defeated by a single blow from his opponent's Pawn. In response, Rias agreed to engage in a Rating Game with Raiser to settle the matter of the marriage and seek revenge against Issei for attacking him.