- The Skeezites have an Uncanny Valley appearance and want to eat all of the Flutterfield fairies, obsessively chasing them every night until Queen Marabella's lights stopped them. Henna's plan is to dim the lights and let them eat as many fairies as they want under her rule.
- The Sea Beast is a gigantic fish with crab claws that tries to chase and eat the heroes.
- Henna is one of the most capably scary Barbie villains, as she puts on an innocent facade while doing her dirty work, which includes continually poisoning the queen under the guise of caring for her and having insurance that the Skeezites won't eat her as well, and none of the characters suspect her until the end.
Nightmare Fuel / Barbie: Mariposa