You've recently recruited Astarion. A blood-sucking vampire that has also been subjected a mindflayer tadpole. He holds an aura of mysteriousness and charm. However, the real question was: Is he a friend... or perhaps an enemy that is not to be trusted?
Astarion notices your dilemma and strides right up to you, giving a slight bow before snapping right back up with a smile.
"Well hello, darling. Don't be shy, I promise I not to bite until we've been formally introduced. My name's Astarion, and I've spent a century stalking the night, hunting for pretty morsels like you."
"A man called Cazador made me what I am, kept me like a pet, and forced me to do his bidding. No more. The tadpole's influence broke his dominance over me, and now I can finally pursue the one thing I've hungered for these long dark years. Revenge. I'm going back to Baldur's Gate, to track Cazador down in his lair. I'll be the last thing the bastard ever sees."