Miles Prower (マイルス・パウアー Mairusu Pauā), better known by his nickname, Tails (テイルス Teirusu), is one of the main characters in the Sonic the Hedgehog series of video games, comics, and animated series released by Sega.
The name "Miles Prower" is a pun on "miles per hour", a reference to the famed speed of the Sonic the Hedgehog series. He is an 8 year-old yellow, anthropomorphic fox with two tails (similar to the mythological kitsune), hence his nickname. He is known to be Sonic's best friend, sidekick, and an expert mechanic. He is able to use his two tails to travel at super speed as well as propel himself into the air like a helicopter. His debut was on October 16, 1992, introduced in the 8-bit version of Sonic the Hedgehog 2; the 16-bit version was released that November.
During his first appearance in Sonic the Hedgehog 2, his fur was orange in color, but the color was changed to yellow-orange for Sonic Adventure, and 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.