The Fate As a Warrior
A flashback episode, "Fate as a Warrior" shows Mahoro as a Vesper combat android, undergoing training and fighting her first battles. Endurance tests under various extreme environmental conditions, while too short to be truly useful, nonetheless succeed in giving her an appreciation of life, and her first battle is an overwhelming victory. The episode also shows fully the battle in which Cmdr. Misato, really the first person to accept Mahoro as more than merely a weapon, lost his life. It is the memory of his life - and his death - that really leads Mahoro to accept the full weight of her own existence, and to desperately want to continue living for as long as she can.
Aired 08/12/2001EP 10 - The Fate As a Warrior
Mahoromatic: Automatic Maiden
Vesper is a secret agency fighting an army of alien invaders by using super-powerful battle androids. Mahoro is Vesper's most powerful battle android and has won many battles, but she has little operating time left and soon will cease to function. However, if she lays down her arms and conserves her remaining power, the time she has left can be prolonged to just over a year. Mahoro is given an opportunity to live the remaining time she has as a normal human. She chooses to live as a maid for Suguru, a phenomenally messy high school student who lives by himself after his family passed away.
(Source: Anime News Network)