Yasushi Yamaguchi, originally the main artist and zone designer for Sega's Sonic Team, designed Tails for an internal competition for a sidekick to the speedy hedgehog. Tails was rated the third-most-popular character in the franchise, behind Sonic and Shadow, in an official poll from Sega in 2009. In the mid-1990s, he was featured as the main character in a number of spinoff games: Tails and the Music Maker for the Sega Pico, and Tails Adventure and Tails' Skypatrol for the Game Gear.

He debuted in November 1992 with the release of Sonic the Hedgehog 2. A mechanical genius and skilled pilot, he can fly by spinning his tails like a helicopter rotor and can be seen flying in multiple games and TV shows created by SEGA. He is a two-tailed fox, hence the nickname. The name 'Miles Prower' is a pun on ' miles per hour', a reference to the famed speed of Sonic the Hedgehog. He is the second character to consistently appear by Sonic's side in the series. Tails also appears in his own spin-off series, comic books, cartoons, and films. Miles Prower ( Japanese: マイルスパウアー, Hepburn: Mairusu Pauā), better known by his nickname Tails ( テイルス, Teirusu), is a fictional character in Sega's Sonic the Hedgehog series, and the title character's best friend, sidekick, and most recurring ally.

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