Jarlaxle Baenre is a drow mercenary and leader of the Bregan D'aerthe mercenary company. He is (sometimes) an ally of House Baenre, although you can see on several occasions that his band's services are available to the highest bidder or to whoever suits him. Obviously House Baenre is the biggest house and so has the deepest coffers. He is one of a small number of male drow who actually have some power in a Lolth-worshiping city