Tenten had honestly forgotten there was a fourth person there. She practically jumps out of her skin when Jackie does speak up, then promptly tries to play it off. Nope, nothing out of the ordinary here.

Jackie gets a long, measured glance as she takes in the blood. There's quite a few reasons someone would be bloody and, apparently, uninjured, and almost all of them bring up warning bells in the back of her head. Then again, he could just be a hunter. "Don't worry about not knowing much, we can share knowledge easily enough. Y'know. If you're okay right now." Gotta have their bases covered.