Edith is not unlockable, because she was cut due to balancing/design issues!
Edith is an unused character in the Antibirth expansion. She is unable to walk normally, and instead moves around by teleporting to a cursor on the ground, similar to items such as Epic Fetus. She is able to destroy obstacles and damage enemies by landing on them.
Items that Edith would have potentially unlocked include:
- Edith was originally supposed to be a secret character similar to The Lost and Keeper, but was cut as the author of the mod didn't have enough time to balance Edith before release. The author claims that the character may be implemented in a later update.
- Her character code is 103, she can be accessed by doing memory modifications using cheat engine and she's fully playable.
- In some Jewish traditions, Edith is the name of the wife of the biblical Lot (who is otherwise never named), who turned into a pillar of salt. This is further supported by Edith's white coloration (akin to salt), her petrified look, and her inability to move.