Tiaral

Actually, I don't know where else such a character could be based. It's difficult to come up with another motivation for a representative of such a faction. (unless you create a completely atypical representative, but then the question arises: "how did he even become a vampire?")

vampire enthusiast

A far-sighted enthusiast of immortality.

why on earth did a crowd of people go to Sarcheid?

Money?

Added 2 minutes later

this branch of Boris's skills for crossbows is confusing me... maybe I should put a bolt on it? I won't have enough skill points for everything, especially since I was thinking of taking DESTRUCTION from beliefs, and therefore there are no additional skill points. But all these racial bonuses...

Take the racial skill, ignore armor, and get an AoE attack; you can boost the rest with potions.