What if medium!Hiro did get taken away by CPS once though. He got given back after a few months and a LOT of bizarre shenanigans. Like Hiro sneaking off to haunted houses with a hammer, removing one nail or something else minor, and then just walking around with all the ghosts following him. SO MUCH HAVOC. The foster parents lasted four months, a record for Hiro, then they were like 'Tadashi do you want your brother back he got 1000x worse once you weren't in the picture'.
Can't Cook Tadashi and Medium Hiro end up befriending the very chill neighbours who showed up (even if one DID show up only to 'warn' them that the house was haunted). They were all very surprised when they managed to gather up the courage to visit; the Hamabros and the ghosts were trying to play ball. Inside. It was not going well. The ball kept bouncing off of Baymax and hitting things or people.
What if Medium Hiro was still in high school though. He shows up at the school with two necklaces, each with an odd pendant (a little small normal bit of gravel and a round bit of tile), and he's so tiny. Oh, and followed by 5 ghosts. Honey Lemon has to be physically dragged out of the chemistry labs. By Hiro, because he's the only medium in a three town radius.
Now I just want like a sitcom of all of these crazy adventures. Maybe one episode could be CPS coming for an inspection and possibly to take Hiro away again, but the ghosts and Tadashi work together to frantically clean up the house and make it not look haunted anymore. Only for some reason everything keeps going wrong (Honey Lemonās got some sort of chemical concoction in the attic that explodes, Fredās game of monsters gets out of hand and leaves clawmarks on the furniture, etc) and theyāre down to the wire and freaking out because the house isnāt ready but they can see CPS pulling up outside and oh god theyāre gonna take Hiro away.
Except as the CPS person starts walking up the front path, their next door neighbor suddenly pops out and starts chatting away, distracting them. And when they try to move on, another neighbor pops up with lemon squares they absolute mustĀ try. Together they manage to delay the person just long enough for Tadashi and the ghosts to get the house ready.
When Hiro gets home from school (Wasabi was the one to go with him to keep an eye on him because anyone other than him or Aunt Cass usually leads to hijinks at school that wouldnāt reflect well on Tadashi during the inspection), he finds Tadashi sitting calmly and chatting with the CPS person, serving her tea and cookies that he definitelyĀ did not make himself. The inspection ends up going very well, and the CPS person leaves with no complaints. Itās in fact the best review theyāve ever had.
Afterwards, everyone collapses in relief, including the neighbors. No one wanted to see the Hamadas split up or leave, so theyāre all very happy it worked out. Tadashi resolves to hold a BBQ to celebrate, so long as heās not the one manning the grill (Last time he tried barbecuing anything, they ended up with a new pet goldfish that was neon green, complete with fishbowl. Heād just been trying to cook hotdogs)