"Wow thirteen. I was in high school." Buffy knew that Kitty had 'extra' because while she held back, she didn't have to as much as with others that she sparred with. Both at the hotel and with Giles. Faith didn't count since she was a Slayer, too.

"What big bad wanted to kill you?" She knew that Carlos had to deal with vampires, too but he also had other supernatural things after him as a Warden.