Miles Prower,[a] better known by his nickname Tails,[b] is a character from Sega's Sonic the Hedgehog series. Tails also appears in several spin-off games in which he stars, comic books, cartoons, and films. He is the second character to consistently appear by Sonic's side in the series, appearing in nearly every mainline and spin-off since his debut. The name "Miles Prower" is a pun on "miles per hour", a reference to the famed speed of Sonic the Hedgehog. Miles Prower is a two-tailed fox.