Riegen was one of youngest vampire in his generation, but in his young age, he knows how to live free with human without anyone knows his dark side. He loves to entertain bitchy and brave woman. He loves challenges. Madali siyang ma-in-love pero madali ring makapag-move on. Mas gusto niyang tumira sa bahay na puro ahas kaysa makisama sa mga nilalang na hindi siya kayang intindihin. He's weird. Hindi niya nakukontrol ang lakas sa tuwing nae-excite siya.