Hummingbird Hiro AU: Fred is also winged. There's a lot of anti-winged discrimination. Also, Hiro usually carries sweets around so he doesn't unexpectedly pass out or end up with cravings for sweets. Baymax carries both sugar-free and extra-sugar lollipops, Hiro has never, ever gotten a sugar-free one. (And yes, falcon Gogo. Falcon Gogo is cool. She still uses a bike a lot, because she is hopeless in high winds. )
(2/3): Baymax has wings so he can find stuck flyers-getting stuck is common in youngsters and hummingbirds. Hummingbirds because they can easily run out of energy, youngsters because they can often barely get into the air and have no clue how to fly at all. (Hiro got stuck so. many. times. The very DAY his wings were developed enough for him to fly, he got stuck in a tree flying away from bullies. He went torpid in that tree. When he was freed from the tree, someone started CPR. )(3/3): After the Tree Incident, Hiro started carrying around several bags of sweets at all times, and didn’t go into torpor for years. (He was hospitalised for broken ribs and a punctured airsac. The CPR person didn’t know how to do CPR on hummingbirds or how to tell if a hummingbird is torpid or not. ) In fact, when Wasabi’s van went into the bay, Hiro went torpid to avoid drowning (one breath every five minutes, nuff said) and that was the first time since the Tree Incident.
Ooh, what’s if Fred is winged but his family isn’t and in upper class society it’s very frowned upon. Fred’s parents love him anyways, that’s not a problem, but it’s another reason why no one in the Nerd Lab caught on right away that he was rich, because generally winged folk are considered less cultured. Maybe Fred’s got swan wings though, because there’s still some link between his ‘breeding’ so to speak and his wings.
Oh gosh, yes, giving Baymax wings would be super practical. As would having him carry around sweets. He’s basically designed to take care of hummingbirds, which makes sense because that’s probably what Tadashi had in mind.
THE TREE INCIDENT OH GOD. It started out being something funny and then it became not funny very fast. Maybe Hiro doesn’t go full torpid all that often, but he does often get sleepy or close to it, so he’ll just kind of curl up in a ball somewhere and rest for a moment. Minutes later he’ll be bouncing around like a kid on crack, but when he gets all sleepy you can just pick him up and move him around and he doesn’t say anything or move at all, he’s just like a ragdoll or something. Tadashi has had to pick him up and move him more than once when he sleepy-mode-d on one of Tadashi’s projects.