If I recall correctly, when dwari’s take the slayer oath, they have metal actually infused into their skin. Their skin becomes literal armour. Don’t quote me on this, I don’t know too much about those filthy cave dwelling midgets.
Also, I’ve heard a voice line from Kerillian were she claims Araloth is her cousin. Which would mean that Kerillian is from Talsyn in Athen Lohren and is practically elven royalty. So I guess when she says, “bow before your queen”, she wasn’t joking. Which makes it all the stranger why she had to leave… she must of done something really bad…