Sleep usually means a lot of things; Sleep is what helps one regenerate lost energy. Sleep can relieve stress, letting the body unwind and go into a maximum level of relaxation. But for Zipp, it does not seem to be the case.
(Spoilers for Make Your Mark: Chapter 4.) While still adjusting to life in Maretime Bay, Misty happens to bump into Sprout. As it turns out, Sprout knows something about what Misty's going through. In fact, he's had a similar experience.
When Misty discovers Senor Butterscotch, she asks Izzy about why she created the fake unicorn. Izzy reveals it all stems back to her childhood in Bridlewood.
Hitch burdened by the relentless stress of his duties in Maretime Bay confronts the shadows of his own heart and discovers an unexpected love in the midst of chaos and self-doubt. Will he find redemption, or will the darkness find him instead?