Miles Prower (マイルス・パウアー Mairusu Pauā?, lit. "Miles Pouer"), better known by his nickname, Tails (テイルス Teirusu?), is a fictional character from the Sonic the Hedgehog series. He is an anthropomorphic fox born with two distinct twin-tails, hence his nickname. Because of his abnormality, Tails was a victim to bullying during his youth. One day, however, he met Sonic the Hedgehog and was inspired to become as cool as him after seeing him run like the wind. Tails soon after began following Sonic on his adventures and has since become his best friend and sidekick. He is able to use his twin-tails to fly by rotating them like helicopter rotors and is a mechanic genius and aerial pilot.

Tails is a gentle-hearted, sweet-natured and loyal fox with a positive attitude. In the beginning, he was timid and quiet, but he has opened up and become more outgoing over the years. Tails is not one to grab the spotlight for himself and instead, is always ready and willing to help others without asking for anything in return. A gentle and sweet-natured soul, Tails was initially timid and lacked courage. After meeting Sonic, however, Tails has become more confident, eventually growing into a more outgoing, brave, independent individual and a hero in his own right. Since encountering Sonic, Tails has looked up to him and stood by his side, helping him whenever he can during their adventures.