Serafina and Nami both share a room, and it's relatively messy. More like organized chaos. (Sometimes it's nice and tidy when Sera goes on a cleaning spree, but it gets messed up again after a while.)

Riptyde's whole apartment, including his room and his roommates room, are all kept very tidy. (he likes to clean)

Shelly's room and apartment is kept very clean, if not sometimes a little messy with decorations.

Memory lives in an abandoned school, so her place is relatively clean if not dusty. Her main living area is the library, which is kept pretty clean for the most part.

Dez's place is a mess, not abhorrently filthy, but still very messy. Mainly just clothes thrown everywhere and boxes.

Dakota's room is clean and organized. From the shelves to her floor, everything is placed in a particular spot.

Dawn doesn't like things to be messy and disorganized, but she often gets overwhelmed and her room ends up becoming that. She'll take a day to clean and reorganize when she gets her thoughts together.

Lions whole shack is a bit of a mess. He just throws things wherever, keeping what he uses daily by his bedside.