I don't like Halsin

I failed to save Halsin from receiving damage after setting him free in the beginning of the fight with Orin. But I couldn't care less. No, honestly, can anyone explain to me his character? People complain about Wyll being boring but at least he has something interesting going on in his life while Halsin... He doesn't actually have grand purpose in life or threat. Big part of the game he spends in camp just chilling and repeating same lines over and over again and not contributing anything. And then he gets all horny without reason and just wants to fuck. Why do people like him? In all of my playthroughs I rarely even offer him to join my party...