Asmodeus is a natural flirt and is very charming, despite often being narcissistic as well. He takes a lot of pride in his looks, and takes extra care of his appearance. Despite his narcissism, he's deeply insecure and seeks love and attention, thus becoming clingy and affectionate towards anyone he likes. He has a yandere side as well, though he usually keeps it well-hidden. As the Avatar of Lust, he often oversteps boundaries or acts predatory without being aware of it.