Grey's is a bit erratic even when she has a consistent schedule. It's rare for her to remember dreams so anything recurring is hard for her to place.
Emily is consistently a good sleeper and is surprisingly amenable to mornings, even when she stays up late often (which she does). Dreams of being chased often.
Jia is probably the worst sleeper on account of her chronic pain. When she does dream it often feels lucid enough for her to remember.
Vera like Grey, has their quality of sleep vary night to night. Often dreams of traveling.
Amber sleeps like a log and is an early riser. Often dreams of building or seeing stuff constructed.
Chris errs toward poor sleep, doesn't remember her dreams much.
Sophia can get by with concerningly small amounts of sleep, doesn't have a hard time collapsing or waking. Dreams are often surprisingly chill.