Come to think of it Loki was a red-haired, green-eyed squirrel girl during the Crossover Wars.
A (relatively) quick search through bookmarks & odd links brought up
Kate from magick
Akashi Animi of Noctis Requiem
The Captain from I Was Kidnapped By Lesbian Pirates From Outer Space!!!
Akai/Trucker Fuschia of ConScrew
(if you ignore the fact that she is a fictional character in the webcomic)
Ara of Tales Of Thistledown
Anne Onymous The Wotch