He is one. He's active in Kindred society, so if you suck blood, he'd love to meet you. He also enjoys sucking blood, so if you have blood, he'd be interested in sucking some of it.
If he has a Bloodline, it's unknown. He's interested in getting to know the local Ventrue, who may or may not have heard of him from the Ventrue of London or New York. He's also very interested in diving into local politics.
He's a member of the Chorus, a probationary potential of the Circle of the Crone. He is learning their ways and after a century and a half might have finally found his true calling. He's looking to meet more Crones, and also listening to what others have to say about them.
He's a charming fellow, and he likes to mingle. He's often found out and about, and always willing to meet new people. He has a unique way with words, and his deep voice has an unforgettable mesmerizing quality to it.
He refuses to acknowledge his past, but it hasn't just gone away. He's been in and out of a variety of mental institutions and prisons, both as a mortal and as a dead guy. In London until the 1920s, and then in New York until recently. Wherever he ends up, he always manages to get out. With a lot of research (and maybe some magical powers), it might be possible to connect him to his past.
He really loves the stuff, moreso even than most vampires. He likes to see it, to touch it, to roll around in it. This could lead to potential problems with the law. If you're law-enforcement, or even just nosy, or if you'd like to be a witness or a victim, hit me up.
He has a slight mental condition (see above). He could really use a good head doctor to help him sort it out.
Don't go chasing butterflies.