So I've got an AU idea that might spark some good allium duo angst.
You know all those theories about c!Tommy being a lab experiment? And those same theories but about c!Ranboo?
What if we... combined the two:
Behold: Lab Alliums AU! Tommy and Ranboo were made in the same lab and were friends as little tube toddlers before getting separated (Tommy presumably being taken in by SBI and Ranboo to... who the fuck knows.)
There are, like. So many different directions you could take this.
You could go with the idea that both Tommy and Ranboo remember each other from the lab and recognize each other when they meet in the DSMP, which would have some dramatic impacts on their dynamic.
Or maybe Tommy recognizes Ranboo because the guy does have a rather... memorable appearance, but Ranboo doesn't recognize Tommy because memory issues and it's ANGST-
Or neither of them recognize each other and don't figure it out until later (although tbh that's kind of the more boring option imo.)
I just *clenches fist* like allium duo so much.
I like the second one best tbh. It can be a slow realisation, like maybe they're burning down george's house and tommy thinks to himself "man, this is like the time i almost set fire to my home lab!" and then he looks over to ranboo and is like "huh... this seems familiar."
Alternatively, he can see ranboo for the first time and have realisation strike him like a lightning bolt as he sees those eyes again for the first time in years. Maybe it could also be the reason he used to resent ranboo so much; despite knowing about his memory issues, he can't help but feel like his childhood best friend is abandoning him.