I went ahead and made a few NPCs to use in the future, though since I didn't mention their names in the post, I'll do it here in case they need mentioning in the future. I imagine Arye might have a few squad mates of his own, too, unless he's going in alone.

Blair Laflamme - silver-haired glasses guy.
Isaias Moffitt - fiery, talkative kid who has trouble shutting up. 
Elwood Calloway - quiet, bookish green-haired nerd.
Catheryn Vetter - brown-haired woman who tends to be team mom.