Shadowhawk

Shadowhawk is a Decepticon from the IDW portion of the Generation 1 continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Shadowhawk is an associate of Swindle, which probably doesn't bode well for his being a law-abiding member of society.

Fiction

When Swindle was apprehended in a simultronics bust conducted by Orion Pax and Jetfire, Shadowhawk was among the associates he ratted out. Post

"Shadowhawk" was the Japanese-market name for Energon Divebomb.
Shadowhawk and Marauder are potentially references to the tabletop wargame Battletech. John Barber had looked into licensing a Battletech comic book run at IDW in 2013, and the Shadow Hawk and Marauder are two extremely iconic Battlemechs. The fact that neither character is pictured is another potential reference, as the original artwork for both mechs was removed from the game in the 1990s due to a lawsuit over copyright violation.