Her name was Vala, and the other member of the original Silver Blades that the party meets is a dwarf cleric of Tyr, named Derf Strongarm. If I do the sequel, they will both definitely be in it.
But, I probably won't have either of them joining the party, per se. (That's not to say that they won't make an appearance in battle, as, let's say, surprise allies...or maybe even foes. I guess it depends on the story line.)