Kyomei is a vampire working as an idol to spread positive reception of vampiric individuals. In his more personal life he's extremely mischievous and loves pranks that usually do more harm than good. He can be somewhat pretentious, choosing to only drink the finest human blood — this fact is fiercely guarded to prevent his reputation from taking any damage.

His past is largely unknown. He doesn't like to talk about the things he's gone through, and chooses to focus more on the future instead.

" I am the illustrious Eine Kyomei. It's a pleasure to meet me, isn't it? " — Eine Kyomei