Minthara, no question. I can only hope that they have a lot planned for her character. She won me over in the scene where, after her vulnerability was revealed, she said, "You belong to me now, and I belong to you."
She is easily the most fascinating and compelling character, in my opinion.
*
Failing that, I would recruit a goblin, and I suppose Sazza would do. I've never seen a game that did goblins better than this one. It begs to have a goblin as a companion, they're done so well.
