Miles Prower (マイルス・パウアー, Mairusu Pauā?), better known by his nickname Tails (テイルス, Teirusu?), is a video game character, as well as the deuteragonist of the Sonic the Hedgehog series of video games, comics, animated series and film released by Sega.
The name "Miles Prower" is a pun on "miles per hour", a reference to the famed speed of Sonic the Hedgehog. He is an eight year old fox with two tails, hence the nickname. He is known to be Sonic's sidekick, best friend, and a mechanic. He is able to use his two tails to propel himself into the air like a helicopter for a limited time. His debut was in October 16, 1992 in the 8-bit version of Sonic the Hedgehog 2; the 16-bit version was released that November.
When he was first introduced in Sonic the Hedgehog 2, Tails' fur was orange. The color was changed to yellow-orange for Sonic Adventure, and later to light yellow for Sonic Heroes. In 1993 and 1995, he starred in his own games, Tails and the Music Maker for the Pico, Tails Adventure, and Tails' Skypatrol for the Game Gear. Tails is the third most popular character of the series, behind Sonic and Shadow, according to official polls.