The electronically (or so she assumed) disguised voice that came from Mr. Green Jeans was a starting to get a little weird, especially in the position she was in. "I've had better, Vader." See? Buffy could do nicknames too, even when living in a weeble wobble world. She really didn't want to rely on a guy with a crossbow and leather fetish, but it was either him or the one calling her Perky. Leather won out over rubber chickens.
So she leaned on Green Vader with a frown but accepted his help nonetheless. "If you're going to be my human crutch a name would be handy now, otherwise I'm going to start thinking you're that guy from the Princess Bride under the hood." She could easily call him Robin, but that was so overdone and Harley's suggestions just didn't work for her. "And can someone tell me where Cleveland went? Because I'm pretty sure this isn't it." Even concussed she was still trying to function. She may have lacked the perk but she was still trying to get things done in some sort of context.