The Firefly is a boss introduced in Metal Slug: Awakening and serves as the third boss of Joint Operations.
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A Martian weapon with teleport abilities, equipped with four extremely flexible electromagnetic whip cannons. the Martian Machine hidden by the Rebel Army has a Martian on it! The fighter aircraft has the ability to teleport for launching surprise attacks. Its melee whip and electromagnetic floating cannon are both swift and powerful. If you are careless, you will be easily defeated. If you annoy it, it will grab it's UFO then hit people with it!
The Rebel Army imprisons the unlucky Martian engineer on Earth, forcing it to make the Martian fighter jet for them. It infuriates it to see its home jet with the Rebel Army's symbol, so it throws bombs to vent its anger. But the Rebel Army doesn't know that it is secretly testing the teleport function of the jet. Once it succeeds, it will return to Mars without anyone noticing.