The demon guy in Spooky Mansion (Haunted House) is Iaachus the Collector and Detritus his servant, they weren't the same person, and also Iaachus' character is a halloween event right? But the Praharma in Akra is Phobos (Personification of Fear). Unlike Arihama (Ares) which personifies anger.
But if you are refering to Asmodeo which is a demon, he refer himself as a succubus (when he is infact an incubi).