The Indigo Girls were a group of lesbian activists that originally intended to stop sexism and heterosexism but, instead, succumbed to it by becoming 'bunny girls' of The Otter where they lived in the Crow's Nest surrounded by porn magazines.
Mindy is incredibly strong, able to pick up a man and toss him out of a window. She's aggressive and outspoken[NeS1 1].
The Fight of the Century of the Week
Antestarr is in the Crow's Nest with The Otter and explains how he had tried to order a dyke from the Officials' Board but accidentally got a pike instead. The Crow's Nest is then invaded by The Indigo Girls who are angry with Antestarr's crude request. Before they beat him up, however, they're distracted by Otter's massive porn stash. Mindy, one of the Indigo Girls, kicks Antestarr out and the Indigo Girls become Otter's 'bunnies'[NeS1 1]. The former owner of The Crow's Nest, the arena janitor, shows up but The Otter murders him with his huskarl sword while The Indigo Girls just giggle[NeS1 2].
"The Indigo Girls appear to be based on the rock band "The Indigo Girls[Ext 1]" who are also lesbian activists. However the women in Otter the Writer's post do not reflect the actual members of the band, of which there are only two and neither of them are called 'Mindy'." ~ Britt the Writer