Firefly is a code name that is shared by several iterations of the same character:
- Firefly (RAH) - the Cobra saboteur extraordinaire of the A Real American Hero series.
- Firefly (Sigma 6) - the G.I. Joe pyro weapons expert from the Sigma 6 series.
- Firefly (Resolute)
- Firefly (Movie)
- Firefly (Renegades)