Your Dexterity score increases by 2 and your Charisma increases by one.

A Fairy doesn't age and can basically live forever.

Most Fairies are chaotic good. As a rule, they are good-hearted and kind, hate to see others in pain, and have no tolerance for oppression. They are also very chaotic and impulsive, acting purely on their whim.

Faries average about 0,3 feet tall and weigh about 0,3 pounds. To prevent any rule related confusion, your size is small.

Your base walking speed is 25 feet.

When you roll a 1 on the d20 for an attack roll, ability check, or saving throw, you can reroll the die and must use the new roll.

You have advantage on saving throws against being frightened.

You can move through the space of any creature that is of a size larger than yours.

You can speak, read, and write Common and Sylvan. 

You can speak telepathically to any creature within 30 feet of you. The creature understands you only if the two of you share a language. You can speak telepathically in this way to one creature at a time.

You can use your move action to mount a friendly creature within 5 feet reach. While you are mounted, you occupy the same space as the creature and move along whenever it uses its move action. You can still use an action for spellcasting, attacks, your bonus actions and reactions. You can end the freature by using your move action to get off the creature and land in any unoccupied adjacent space around it. The feature also ends if either you or the ally you mounted fall unconscious or if your ally falls prone.

Whenever the ally you are mounted on is being attacked, the attacker can choose wether it attacks your ally or you. Spells that affect adjacent creatures of the target still affect you.