He tries not to get his hopes up when she questions his code name. There's definitely recognition there, for the Hulk anyways. But it's a large multi-verse and if she doesn't recognize 'Hulkling' then it's more likely that she's not from his world. But he follows her down onto the hotel's rooftop and, after a moment, shifts to his normal human form. From tall, large, and green to slightly shorter, broad shouldered, white teenager sans the wings.

"I guess you could say I'm a fan. Of all the Avengers really. When my friends and I started our team, the Young Avengers, we all picked an Avenger to kind of...inspire us." AKA basically ripping off their hero personas. "We were going for the whole 'next generation' thing."