Miles "Tails" Prower

Miles "Tails" Prower is the deuteragonist of Sonic the Hedgehog series. He is Sonic's best friend.

Sonic the Hedgehog
Sonic is Tails' idol, mentor, best friend and father figure.

Amy Rose
Tails and Amy are close friends.

Knuckles the Echidna
Knuckles is Tails' best friend after Sonic.

Dr. Ivo "Eggman" Robotnik
Dr. Eggman is both Tails' enemy and rival.

Shadow the Hedgehog
Tails and Shadow are either allies or enemies, depending on Shadow's goal.

Wave the Swallow
Wave is Tails' arch-rival.

Rouge the Bat
Tails and Rouge are rivals.

Cream the Rabbit
Tails and Cream are close friends who have a secret crush on each other, but both are too shy to admit it.

E-123 Omega
Tails and Omega are close friends.