Here I've got another selection of characters:
The round up is:
1. A big ball of fluff that rolls around on the floor to clean up left over Nightmares.
2. A plant lady with very convenient vine hair to carry any extra cleaning utensils/products.
3/4. Inspired by night blooming Jasmine, 3 grows these flowers that attract fireflies to light their way. Likewise, 4 also blooms Jasmine but only one large flower on its head which glows at night.
5. Its head piece opens up into a large colourful fan that it sways back and forth to blow away the Nightmares.
6. A frizzy little guy that, when concentrating, can fire off a set of colourful sparks that chase off Nightmares.
7. Is a smarty that wears clever goggles which allow it to see even the most hidden Nightmares.
8. Looking a little flat, this creature jumps into a headstand and spins around to polish up after the Nightmares have gone.
I like the idea behind 3/4 but I think my favourites are 5 and 8. They're all pretty charming though, so let me know what you think! :D