Stellaron Hunter AU time, since I've been putting this off for so long, but finally know the words to make a nice post regarding it. I'll be using this design as a reference.
So as expected, this verse comes from the idea of what if instead of the IPC capturing Sunday, and thus Jade releasing him, and Sunday eventually joining the Express, it's focused around Sunday being picked up by the Stellaron Hunters. He already has an IPC bounty held over his head with being captured, so what better way to break him out and really have him as a true fugitive.
He's put to good use, and taken much better care of then the Family. Sunday's Harmony powers are his main style of fighting as always, though he has been learning from Blade and Kafka how to use a rapier. Nothing much really has changed about him, still being that same nervous bird who's religiously traumatized. He still holds a heavy burden over what happened once the dream ended, but he's grateful for the hunters who picked him up to offer him a second chance.
Because of this he does not go through what happens with Wonweek. Especially because Welt was with him when it came to the final battle he had against him. Though there's still one final wish Sunday asks for before leaving the planet for good - and thankfully he's able to fulfil it by seeing Robin one last time - so that much hasn't changed at all.
Infact, speaking of Robin he still keeps an eye on her, aswell as her absolutely keeping an eye on her brother's bounty. One can only imagine the surprise when she starts seeing bounty posters for him.