A bit of a cracky prompt that came to me as I've been watching more and more anime recently (yeah, I know, I bet some people are groaning on reading this because of how bad some anime tropes are).

Basically, after years of being single and wandering the world doing fuck knows what, his friends and those he considers family (e.g. Hermione, the Weasleys) are stunned when they receive news that not only is he returning to the UK, he's also bringing along his girlfriend/fiance/spouse to meet them and to settle down finally.

The hitch? She's not human, and as such as a very orange and green/alien mentality and way of looking at things.

She could be pretty much anything, as it's a pretty open prompt -- the hilarity would come from the hijinks caused by her simply not understanding normal human customs/social norms, her thinking being alien/different, and (to people's horror) Harry being completely nonplussed/apathetic to her views, despite half-heartedly trying to get her to understand.

As it's open, it could be an interesting take on a canon being/creature in the universe, such as a veela (this could add another layer of hilarity if Fleur Weasley and her family have to try to mediate/act as a go-between/"putting out fires", as since they're mostly human they have a human mindset), a non-HP vampiress that's completely naive or friendly in a batshit way, a kitsune that genuinely doesn't understand that, yes, tossing someone through a concrete wall does hurt them, or someone/thing more unique from/to a crossover (e.g. Moka, Nyaruko, et cetera).

A bonus could be that while Harry is a normal wizard (no "Master of Death" crapout-copout), he did some utterly bizarre munchkin bullshit with existing magic/some generic stuff across the Wizarding World -- it unintentionally impressed/terrified her family, so they think he's something else (he just runs with it because no matter how many times he/they tried to correct them, her family thought it was more a nudge-nudge-wink-wink "I'm a completely normal wizard" wink kinda thing). These misunderstandings keep occuring, adding a contrast between his beau freaking out his wizarding friends/family, and himself freaking out her family/friends.