Fairy Queen
The Fairy Queen is an EXCLUSIVE pet that could have been hatched from the Exclusive Pets Egg, at a 13% chance. It was released in the Axolotl Update.
The latest Pet Simulator X value list for Fairy Queen can be found below:

Regular
💎 8,200,000,000 (8.2b)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available