Because you know i'm all about vlad tepes, vlad tepes, no treble :v

That's what I heard when i listening Meghan Trainor's 'All about that bass' song. Anyway, the characters on the comic is both named Vlad Tepes XD. The red headed one is from Korean webtoon,
'Crepuscule' (... and actually Vlad Tepes on Crepuscule is a girl (or you can call her a reverse trap character) lol). And you may know the black haired one, he's from 'Dracula Untold' movie.