Edith

Edith, full name Edith Foster (イーディス・フォスター Īdisu Fosutā ) is a hidden character in Succubus in Wonderland. She is the younger sister of Alice and Lorina.

Edith_D
Outside the game itself, Edith is referred to in a file named "Edith_D". This is found in the folder "記憶の鍵" (meaning "Key to memory"), which comes with the game folder. The contents of this file are:

Edith > D.

Lorina-1...9666

Lorina-2...6669

Lorina-3...Mirror House

Lorina-4...X1,X2,X3,0 (000X ... Play GrudgeSong)

memo-

-

This contains the codes (and hints for the codes) that must be given to the first four Lorinas to unlock access to their memories: 9666, 6669, 6669 and 6910. The first two are simply given in the file. The third is given by two hints in Zendegee Forest's House on the Bank. The fourth is the non-zero digits in the song codes of the first three Lorinas (0006, 0009, 0001) plus a zero at the end.

Appearance
Edith appears only once and only on the game's genocide route, on the path to Wonder Castle. Interestingly, she appears as an elderly woman despite being the younger sister of Alice and Lorina.

Personality
Little is shown of Edith's personality. She does seem to want Reto to not complete the genocide route, advising him to "close this story" right now. At the same time, she seems apathetic as she claims she no longer cares even if Reto wants to destroy the story. Edith also thinks that what happened to her oldest sister, Lorina, was a shame, and she wanted her to live even if it was only in a story.

Background
Like her sisters, Edith was given her name by her mother, based on what Alice says in her first appearance.

At some point, Edith somehow became aware of her two sisters both making deals with a devil. Lorina's deal resulted in her memories being sealed into four birds that took on her name. Edith is implied to have written up the Edith_D file to allow the player to access these memories.

Succubus in Wonderland
Edith is mentioned by Alice when encountering a monument in Gene Labyrinth with the inscription: "The key is hidden in the real world. It is near the entrance to the world. Trace four memories from the book written by my sister." This hints at the Edith_D file. A Lorina deeper in the labyrinth gives another hint to this file.

Edith only appears if the player nearly completes the genocide route. In the form of an old woman, she says that the player has taken Alice's name before her soul could establish in this world, that Alice made a deal with a devil to find her sister and this world is born from the story she wrote, that Alice and Lorina will never appear in this world again, that she (the speaker) is their younger sister, and once again warns the player to close the game. She then disappears.

Trivia

 * Edith is based on Edith Liddell, the younger sister of Alice Liddell. Both were women who existed in real life, and the latter is speculated to be an inspiration for the Alice of Alice's Adventures in Wonderland.