Jet is a boss who makes his first appearance at the end of the second stage in Streets of Rage 2, returning again as the boss of Stage 6 in Streets of Rage 3. Variants of him also appear as minor enemies throughout the games.
Jet appears as a maniac wearing a jetpack. Accordingly, he remains airborne the entire fight, making him very annoying, since it is difficult to combo him. He is also accompanied by many minor thugs (Galsias and Donovans) during the fight. From longer ranges, he will fly toward the player with a punch or come down with a kick. At close range he will pick the player and fly up then slam the player to the ground, causing massive damage.
Jet appears again in Streets of Rage 3 as a boss with a new appearance, with a shaved head, wearing a cybernetic suit and using a breathing apparel. He fights much in the same way as before, though this time he can now use a mini flamethrower from his suit's chest compartment and can shoot out small bombs from the back, and he is accompanied by Rockets which respawn up to a maximum of ten.
Jet and most of his variants in Streets of Rage 2 are apparently named after types of rockets and missiles.
In official artworks, Jet shares physical similarities (notably the long nose, hairstyle, flight goggles and jetpack contraption) with Jet Link a.k.a. "002" from the Cyborg 009 anime series, as both characters are endowed with flight apparatus (though in 002's case, he has both legs converted into jetpack-like turbines, contrasting with Jet's simple propulsion backpack).