Child Slaver

 is the slaver that waits outside Little Lamplight to receive Bumble.
 * It's quite possible to lure her out and kill her by bringing Bumble out from the caverns. This does not seem to make other Slavers hostile towards you. (And no Karma loss, since the necklace is never placed on Bumble.) "I don't like outside. I'm going home", Bumble will say and go into the caverns again.