Lily in a look inspired by American McGee's Alice series, the third game of which i think is being developed or crowdfunded now? I liked some of these, DL the set zip here: https://we.tl/aBhK3JMNLG (fixt 11/27)
Like the Arisia Green Lantern, this is a costume that's seen much use, over the years...will have to get a retrospective set up, sometime soon.