- Age: 8
- Gender: Male
- Race: Fox
- Color: Yellow-orange
- Birthday: October 16th
- Birthplace: Westside island
- Favourite color: Blue and Yellow
- Favourite food: Mint candy
- Likes: Mint Candy, Adventures, mechanical things, planes, machines, hanging around with Sonic, creating new machines, flying, swimming, inventing, helping, believing he can do something, surfing
- Dislikes: Getting left out, Eggman, Eggman Nega, people mistreating old machines, being teased, being bothered when he's in the middle of something complicated, when no-one listens to him, lightning, people making fun of his machines, thinking he can't do something, Amy's yelling or rage, having to fight a friend, when friends are hurt, people belittling him, people who threaten the whole world, ghosts, being surprised, Knuckles teasing or scaring him
- Romance/Love Interests: Cream the Rabbit, Cosmo the Seedrain
- Best friends: Sonic the Hedgehog and Knuckles the Echinda
- Close friends: Silver the Hedgehog, Blaze the cat
- Rivals: Dr. Eggman
- Family/Relatives: Rosemary Prower (mother), Amadeus Prower (father)
- Theme song: Believe in myself
- First Appearance (game): Sonic the Hedgehog 2
- Ability type: Flight
- Powers: None
Since he was young, Tails has been at Sonic's side, helping him and hanging around with the others. He continues to be at Sonic's side in stopping the forces of evil, though he is also a heroic in his own right.
Tails is a very friendly and humble fox. He looks up to Sonic as a "big brother", and though he lacks confidence, he is always quite capable around Sonic and often helps him out. He is very intelligent and at times he has even outsmarted Eggman along with the gang. Tails seemed to be perfectly satisfied with just being a "sidekick", but after his adventures in Downunda, he found he could be just as brave and independent as Sonic. Tails has a few weaknesses: though intelligent, he is naive and still can act a bit childish at times. He also appears to be extremely ticklish, especially on his feet. He used to blurt secretive plans when under pressure (including other secret thoughts.
Tails is able to use his twin tails to hover or fly, or simply increase his speed on the ground. His speed can increase to a point where he can even keep up with Sonic, making him one of the fastest characters in the series, though he can tire out quickly if he uses it too much. He maintains a genius intellect and is a capable inventor and skilled mechanic, sometimes working alongside with Cosmo.