Hiccup Horrendous Haddock the third from the HTTYD books and Aaron from Fox's Tongue And Kirin's Bone by @muffinlance would get along like a house on fire. They may or may not end up setting a house on fire, depending on whether getting out of the situation they'd managed to get themselves into requires some light arson or not.
They're both very respectful of nature and the fact that it could kill them if they're not careful. They're also firm believers in speaking to a fellow in their own language if at all possible. They are both as skilled at words as they are at weapons, and are able to talk their way out of an alarming amount of situations. Right now, i think the only thing that would give Aaron some pause is the fact that book Hiccup comes as a package deal with two-to-eight dragons and at least one other human.
("Oh, dragons from the Barbaric Archipelago would never doppel," Hiccup said, in a tone of voice that implied dissapointment at this fact, "they're far too arrogant for that sort of thing."
He said it like he meant for this to be reassuring. It was not.)
