Elio's Mega Soul Chain, which is always kept around his neck at nearly all times due to how much it cost to make it, materials needed for its creation, and his Key Stone being a rarity due to having a different color scheme than normal ones for unknown reasons.

Norra has a picture of her when she was younger with her Parents on a self right next to the front door when you enter her home. It's the only thing she brought from her parents house over to Czeraja, since she feels they aren't dead despite what the reports say.

cyril has a promise ring that was given to him when he was younger, he always keeps it on him and makes sure to never lose it bc it means a lot to him

For my girl Mary it would have to be a locket with a photo of her with her late parents. She wears it pretty much everywhere she goes, it’s just not usually visible under her outfit.

Astra has an old promise ring made of thread that she was given when she was much younger (not sure exactly how old) but either she still wears it if it fits or somewhere on her person, alternatively, after she gets a home, she keeps it in a lil chest or something, along with its match.

Cotton has her old gym circuit (galar oc) thing, filled out with all the badges from about a decade ago. Its tossed somewhat haphazardly behind her other work, hidden from the eye of someone who doesn't spend a lot of time in her office.

Grim's is a the silver necklace where his keystone is. It was actually his mom's, but he never met her due to unforseen circumstances, when he ran away from home he took it with him. When he's not wearing it he usually keeps it in a small bag in his pocket

Norrie's prized gift is her first hairclip, which the one she wears right now is based off of!
Since it's very old (She got it when she was like 9~10), she keeps it in an area that's hidden from her pkmn!!

Lionel keeps the first car he and his father ever worked on stored in the above ground garage on his floor of the League building. Think Tony Stark's garage from Iron Man, in a sense.

The car is fully restored and functional, but he'd never so much as put the keys in the ignition. Just the memories of working on it with his dad and its existence as a successful restoration is enough.

The only one right now would be Stephanie (Dory’s mum): She keeps this old box under her bed that’s filled with her late husband’s old things, stuff like his lab coat, his glasses, some albums, etc. (I’ll probably go into detail on them in Spikemuth Girls… but it will take a really long time lol)