Alastor x Reader idea!!
Al and (Name) knew each as kids. (Name) was homeless and an orphan when they were kids. they had to steal and fight just to survive, earning the name street rat. And the great depression didn't help at all. one day when Al was at the farmers market (stands/stores out side that farmers set up to sell) and stumbled upon (Name) in an alley way. He tries to help (Name) but they get freaked out and scratches him. the next day he comes back with clean clothes, some small first aid, and food. (maybe just one or two) (Name) this time doesn't attack him or freak out that much. they let him help them and the rest is still somewhat not thought of yet. but they become childhood best friends, always their for each others side maybe for murder to and for comfort.
when they die they get sent to hell as some sort of rat (either a hybrid like Al or like Husker). For some reason (either related to their death or other reason) Al wanted nothing to do with them. Now (Name) would be slightly weaker than Al and also an overlord (they haven't killed as many people, it was mostly just theft and some murder. maybe more) or their very weak. it would fit better though if they become homeless again.
They could be offered a job at the Happy Hotel (Before Al joined / before the pilot). It would be funny if they were the chef (like rent the rat) but other jobs are fine to. After Al joined the hotel he suddenly acknowledges (Name) and tries to either continue to ignore them for acted like he never ignored them. and reasonably (Name) is pissed off about it.
it could be a ship (Al is still ace tho) or it could be completely platonic. but do remember they are around the same age maybe a year or two difference.
some of (Name)'s traits could be pissy, easily aggravated, sarcastic, obsessed with shiny things and snappy. just some ideas but they can be changed.
if you do use this idea please tag me in it!! :3