[She smiles at him in return, full of relief. If he's anything like Dipper (and he is pretty fond of long-winded explanations of stuff, so yeah, they do have a thing or two in common) then he'll probably need multiple reassurances, but that's okay. Mabel's not sure if awkward friend hugs are a thing, but she might need to make it a thing.

And, privately, she promises herself if she ever meets Killua's brother she is going to give him a piece of her mind. The jerk!!]

Yeah! And then we'll do cool, non-dangerous and fun things. Since you're on vacation from school, you need to make the most of it.