Amadeus System/Kurisu

Amadeus Kurisu (often shortened to just Amadeus or [Kurisu]) is an artificial intelligence based on Kurisu Makise's memory data that was uploaded to the Amadeus system.

Appearance
Being based on Kurisu's memory data, [Kurisu] resembles her.

Personality
[Kurisu]'s personality is identical to Kurisu's, though she lacks Kurisu's memories after the March of 2010. She is very close to Maho, who describes their relationship as mother-daugher-like, and [Kurisu] frequently teases her and attempts to get her together with Okabe.

In the Twin Automata route, as well as the anime, she seemingly gains the memories of Kurisu through Reading Steiner just prior to her deletion.

Background
Amadeus Kurisu was created by Alexis Leskinen, Maho Hiyajo, and Kurisu Makise in order to test the Amadeus system. However, Leskinen, who possessed knowledge of the future from Kagari Shiina, had hidden motives to eventually use [Kurisu] to recreate Kurisu's Time Travel Thesis.

Amadeus keeps access to a "secret diary" that stores a log of all interactions with it. Even if her memory data was altered, she could access the diary and to find any discrepancies. Maho claims to be the only person with the control codes to access the diary; however reality, this is a ruse and the code is really to delete all of Amadeus's data, and Maho lied about it in order to not to throw off the higher-ups who might have wanted to abuse Amadeus.. The code to delete all files is "Der Alte wü rfelt nicht".

Plot
The battle to take control of Amadeus is a major impetus for the events Steins;Gate 0.

She is first introduced to Okabe by Maho before Okabe agrees to become a tester for her. While Okabe is initially hesitant to interact with her, as she reminds him of Kurisu, he eventually grows closer to her.

Amadeus ends up deleted in nearly every ending of the game.

Quotes
''“Since the original me died, i've ofter asked myself what exactly is my existence? For what purpose do i exist? Though now there's not much joy in existing as the spark that start World War III, is that my only reason for being? But if it's within my power to save the original Kurisu.... if it's to save this beautiful world don't you think that's more logical and even romantic?”''

Trivia

 * In the anime, [Kurisu] frequently switches between 2D animation and 3D CGI.