Gumbies are the more or less identical background troops serving the Autobot and Decepticon cause.
Generally gumbies are nameless recolors of existing characters who never get any lines and are drawn in to fill up the background, especially in battle scenes (you may remember them from the original cartoon).
OCs whose background consists of "always just being there" are considered to be gumbies who through some special effort or good fortune were promoted and started getting lines.
Occasionally gumbies are named in the course of roleplay and these "named gumbies" tend to start recurring, although they may not be lucky enough to eventually become OCs. Recurrent gumbies sometimes die but just as often come back again without anyone noticing or caring that they were dead for a while.
Autobot Gumbies
Autobot gumbies are usually cars or trucks. Occasionally they're cranes or other pieces of construction equipment.
Decepticon Gumbies
Decepticon gumbies are almost always jets or tanks. Sometimes they're extra Constructicons. Extra Reflector guys are just Reflector. He exists in all time and space simultaneously.
- Boomslang - An F/A-18 jet gumby. He started out by attacking London and has appeared in various scenes since then.
- Bricktop - An Abrams tank gumby.
- Darkgun - A conehead-type jet gumby.
- Hack & Slash - A pair of jet gumbies who appear with Fusillade. They were fused together into a Siamese gumby by a prank of Blitzwing's.
- Kitbash - An F-15 jet gumby who is always changing his headsculpt.
- Redshirt - A tetrajet gumby who dies all the time.
- Repaint - An F-15 jet gumby who is always changing his color scheme.
- Surly - A Sweep gumby name that passes from one Sweep to the next when the predacessor dies. All the gumbies covet the name.