When he backs off, she tries to calm the adrenaline that had sent her running. If he was going to be friendly, she should at least try as well. She lowers hands automatically raised to defend.

"Another troll." That's the only thing that could look like her. She runs through it in her head. Would this human know of blood colors? Maybe. If they killed here. But would the Nepeta be alive? Best to try to figure out all the basics of who she looked like and if they were a threat. Another troll could be friend or foe here.

"What color was she? More yellow than mine?" She nicks a finger with a sharp fang and shows him the bright green blood, "Or bluer? Purple?"