"The Jet" is a unused enemy vehicle in Metal Slug 5.
The pilot of the Jet is similar to Rumi Aikawa, however that is unlikely due to differences in facial features. Presumably, the Jet was meant to be deployed from the front of the Shooting Ray between the cockpits (as seen on the boss' concept art) and act as support during battle. Since the game was rushed, it ended up being scrapped.
- The Jet is modeled after the German Messerschmitt Me 163 Komet served in the later stages of World War II.