Starfleet Green Lantern
Renfield came up with the idea for this costume, which he models here; Thomas helped him make it. It's a fusion of two universes: DC Comics' Green Lantern Corps and Star Trek: The Next Generation's Starfleet.
The insignia, which is the Starfleet symbol against a Green Lantern symbol, was constructed by our friend Andrew Bergstrom.
The visor is a hair clip spray-painted green.