[If you weren't expecting the monsters, how about her phasing into view from one of her stealth abilities and cutting down a creature getting a little too close to him. If she's surprised to see him (and yes, yes she is) it doesn't show on her face, though, instead grinning at him in greeting]
Remember, if we kill them, we get their stuff! [Isabela they're monsters, they don't have shit to steal. but shhh.]