Most of these are pretty scary, so fair warning. The others are just kind of sad
For "Crystal Blue"
Mora has nightmares about things she overheard her grandmother talk about that she wasn't supposed to know. Being hung up like a scarecrow to die of dehydration (she's a mermaid), being trapped in a freakshow, and she also has nightmares about being caught by Mr. Alcott, and her forest being burned down again.
TW// (overdose)
"Damsel in the Red Dress."
Alicia has nightmares that are mostly replays of moments from her childhood, most notably, finding her mother's body on the kitchen floor. She also had nightmares as a child about losing her little brother, him being grabbed by some kind of monster and dragged away etc.
Kattar once had a nightmare that he convinced Alicia to be in a relationship with him only for her to be miserable and regret it. It's his worst fear.