I don't really have many specific plans for my characters, yet... though with the lowered inhibitions, people might be able to actually get Tieria to do something fun. He'll be more open to trying things, so take advantage of it while you can. Something might stick when they get back.
Duo will likely be claiming a treehouse and Kitty will be taking one of the water huts to hang out in, though both will be exploring the dome as well.
Piper will likely enjoy the first day of downtime, but she might have a little trouble completely relaxing on the second day. Expect her to attempt BAKING ALL THE THINGS, even with the bots trying to get her to relax.
As for appearances and possessions, not much will be different other than some slightly longer hair. Piper's red band will be missing, as well as her wedding ring. No one has any lingering new scars that might have shown up anyway from Marina, but Tieria might be weirded out by some things. He had a canon update after his initial arrival that included getting a new body, so there's going to be a few differences that he'll likely be the only one to notice.