Crowley Eusford is a supporting character from the anime and manga series, Seraph of the End. His is the thirteen progenitor and was once a human. He probably live during the Medieval era (my guess is around the crusade) before being transformed in vampire (probably Ferid Bathory).
I like Crowley right away and the fact that he is extremely handsome have probably something to do with it. I love he general way of thinking. Nothing seems to bother him, except maybe that one time Ferid reveal his hide-out to the Moon Demon Company. He his a skilled sword man and love to fight. He like to engage combat with strong opponent, even if he is stronger than them. He genuinely like to swing his sword around. But despite that carefree appearance, he hide a quite intelligent mind, he know when to be cautious, like with that whole smoke illusion scene Norito created.
Not gonna lie I would allow Crowley to bite me and drink my blood anytime we want,
I’ll be his private blood supplier.