The Succubus and the Incubus could be gender opposites. The ability/skill/talent of "Life Drain" to pull the HP a.k.a. health from their enemies (given to their life draining nature), (No sexual abilities due to game censoring). They could have a demon tail, possibly hooves, and a youthful look for their appearance (knowing they drain their enemies life for youth). Maybe their flyer can be demon wings. Weapon-wise I can only suggest, possibly.. a chain whip with blades (or possible knife nails). And lastly, the armor I suggest is the "Light Armor".