If bro manages to ease her off of alcohol, at least a bit, she could be a genuinely good companion I'd say.
But seriously, even for her own good, at least until she manages to save up enough to buy back her equipment/pay off the price of the one he got her.
Posters, this isn't the kind of "fix her" story you think it is. She's only as strong as she is when drunk, she's going to get drunk again, but this time she'll have someone to look out for her. The real question is how that dress is going to get shredded when she goes under again.
Sorry for being that guy, but considering her comment about nights not being lonely with her, I would check her for STD and other shit before going the waifu route if I were the MC.