Joseph of course. Many correctly guessed this before so here we go.
I will keep this short because I only want to cover the Joseph part here. If you want to know the rest then well read the comic.
So Joseph is back alive thanks to Sinister shenanigans and he wants to start over but his face and well recent events make that kinda hard so Wanda takes him in to keep him safe from Orchis and other threats for now.