Zippies - Closed Species

Guess who made yet another closed species? That's right, me.
Basics:

Zippies are impish creatures, that love to play pranks. A zipper on their backs keeps a demon-like thing insider of their bodies. There are three different types - Rascals, Tricksters, and Crooks. They are quite intelligent and can look quite different.

Types:

Rascals: At 12 to 15 inches, these are the smallest type of Zippy. They're also relatively docile and mostly play harmless pranks. Due to their size, cute looks and rather docile behaviour, they have been domesticated. In the wild, they're usually very social and live in groups to protect themselves.
Tricksters: 15 to 30 inches tall and the most common type. Tricksters love to cause mischief and sometimes hurt others, but usually, they prefer not to. Due to that, they usually aren't too popular with humans. Tricksters are fairly solitary, but they can form groups some times.
Crooks: The rarest and largest type, standing at 30 to 45 inches. They are malicious and don't mind hurting others, and will target people and animals if they're in the mood for that. While they don't like the presence of other Crooks, they may lead a group of Rascals or Tricksters, protecting them.

Habitat and diet:

While they can be encountered everywhere, most Zippies live in cities. Here they find places to sleep, eat and cause mischief. They're opportunistic omnivores. They will eat everything; from seeds, nuts and fruits, over food they find in the trash to animals they hunt themselves. Depending on their type, those range from small birds, big insects, reptiles and mammals (Rascals), over birds up to the size of a large crow, rabbits and fish (Tricksters) to sheep, birds the size of a turkey and even pets (Crook.) Sometimes, they even break into stores and steal food from there.

Basic Anatomy:

Regardless of type, they're all rather short and covered in fur. Some may have longer fur on some body parts, others can have hairless tails. Their fur can have any color, and lots of different markings. They've got four fingers with retractable claws, and three clawless toes. While they usually walk on two legs, they may run on all fours, especially if trying to escape from something. They always have horns, and almost always have wings, which, like tails and ears, can be very different on every Zippie. They have small nostrils that are hidden beneath their fur, and very large eyes, that can be every color. Even the sclera can be colored.  On their backs, from their nape to the base of their tail, there is a large zipper. It can have any color, but silver-y grey is the most common. Sometimes, the slider can have a different shape, and some Zippies have a pendant on it. Some even have more than one, but that's pretty rare. If unzipped, their "soul" - a demonic, mostly shapeless being- can defend them if there's no other way. This is incredebly stressful for them, though, and it's only used a last resort.


They're impish creatures that love causing mischief, basically.
As soon as I wrote down the info, I'm gonna open five custom slots, rather cheap ones for the start. Also, "only one" means that only one yellow trait can be on a Zippy, and they're basically super-mega rare uvu

What do you guys think?

Art, species by me