|Family:||Ami Mizuno (daughter), ex-husband; Ami Jr (future granddaughter, "Parallel Sailor Moon" only)|
|First Anime Appearance:||Sailor Moon SuperS movie (non-speaking), Sailor Moon Eternal (speaking)|
|First Manga Appearance:||Act 40 Yume 2 Mercury Dream|
|First PGSM Appearance:||Act 33 - Ami is Changing Schools?|
|Actors:||None (anime), Mariko Tsutsui (PGSM), Naomi Shindo (Crystal)|
Saeko Mizuno was the name given to Ami's mother in Pretty Guardian Sailor Moon; in the other versions she was never given a name. She was a very busy doctor who worked at the Juuban Second General Hospital in the anime series, or at the Meiwa University Hospital in the live-action series.
Ami's mother was only seen once in the anime series, and from the back, in the opening of the Sailor Moon SuperS movie. She was there shown helping a younger Ami make cookies.
Later in the same act, she was used by the enemies to weaken Ami mentally. She came home with a man and claimed to not care about Ami, whose only good point was studying. When Ami awakened her new powers with the help of Guardian Mercury, she used Mercury Aqua Rhapsody to destroy the enemies. After Ami's mother's phantom lover vanished, she fainted.
|Saeko Mizuno in PGSM|
In the live-action series, the Mizunos kept a white board in the kitchen, and they would write messages on it since they rarely saw each other. In Act 33, when Ami was caught out late at night by a policeman, Saeko became concerned and told her daughter that she was going to have her transfer schools, because the public school was obviously not working for her. Ami, however, ran away instead of meeting up with her to look at another school.
In Act 34, Saeko found Ami by the carousel at the amusement park, remembering that it had been her daughter's favorite place since she was a child. Ami explained that she had something to do that was more important than studying, and Saeko told her that she understood, and loved her no matter what.
Ami's mother did not make a formal appearance in the musicals, but she was mentioned in passing more than once.