This article is about a/an sailor soldier in Pretty Guardian Sailor Moon.
Sailor Mercury
Ami Mizuno
Gender: Female
Show: Pretty Guardian Sailor Moon
Color: cornflowerblue
Homeworld: Earth
First Appearance: Act 2: Ami Became a Friend
Last Full Appearance: Special Act: We're Getting Married!
Number of Episode Appearances: 48 (episodes), 1 (specials)
Full list of appearances
Actor: Chisaki Hama
Sailor Mercury
"Mercury Prism Power! Make UP!"

Ami Mizuno is a genius high-schooler who is revealed to be Sailor Mercury. Together with Sailor Moon and the Sailor Scouts, she battles the evil Queen Beryl. For a time, she also became the villain Dark Mercury.


She had no friends before meeting Usagi and always ate lunch alone on the roof so she can study. When she became Sailor Mercury, Usagi wanted her to be her friend but Ami wasn't sure. The student body felt Ami was stuck up and standoffish for her non-socializing. Usagi seemed to be the only one to see Ami is merely shy, not truly standoffish. Ami initially believed she was being her friend just because she was a Senshi. In Usagi, befriending her gradually helps Ami to learn that she is more than just a bookworm. She is extremely loyal to her friends and worries greatly about losing them.

Ami initially had reservations about using Luna's Karaoke Crown Passport to gain free entry, and although Motoki briefly wondered about the existence of these passes, he did not question the Senshi on this matter. Ami was so unused to having friends, that she consulted her old dependable friend: a book. This goes awkwardly wrong. For a short while, Ami and Usagi's best friend Naru share a conflicted relationship as both seem to be jealous of the other's closeness with Usagi. One time when Usagi was under a spell that would turn her into a Youma in Act 14, Ami stood up to Naru to stay out of the way. However, they later resolve their differences and become good friends themselves. In fact, in the Final Act, when Usagi restored the world but was not present, Ami and Naru were close friends, probably because she knew her true identity.

When the team begins to drift apart, Ami became anxious. Unfortunately, she was caught alone by Kunzite and brought to the Dark Kingdom where she was changed into Dark Mercury by the power of Metalia. The Senshi were unable to bring her back until she injured Usagi and couldn't bear seeing her friend hurt. After being healed, she had no memories of what happened while she was Dark Mercury. This haunts her, as it terrifies her of what she may have done to her friends while not in control. When Nephirite became a normal human, he starting working at Crown Karaoke after his forced suicide. He felt the need to return the favor to her from when she was Dark Mercury, a favor which Ami does not recall at the least. Despite this, Ami went out of her way to be kind to him, identifying with feelings of isolation.

Ami has a lonely home life. While her mother is a loving woman and worries about her daughter, she is a very busy doctor and often has overnight shifts. In Act 34, her mother Saeko got a phone call from the police saying that Ami was out late at night, she decided that Ami's new friends may have been a danger to Ami's education and wanted Ami to transfer to a new school. Ami had her first fight with her mother over it, and even ran away from home, spending the night at the Secret Base with Rei. Luckily, Ami convinced her mother that what she's doing in her life right now is more important than studying, she agreed not to transfer schools, because her mother was just looking for her daughter's best interest. Ami's loyalty to Usagi is what allowed her to keep her faith in Usagi's ability to suppress Serenity. And when Serenity finally overcame Usagi's resistance, it is Ami that chose to fight her, because Usagi would have wanted to keep the planet safe. In Special Act, four years had passed and Ami is now studying medicine as the youngest doctor in America. It is expalined that she went to college when everyone else was in high school. She is even seen in a bio-hazard suit & a higher-ranking doctor wants to keep her helping him a secret. She literally hurries to Japan to take care of the threat of Queen Mio & later attends Usagi and Mamoru's wedding.


Ami is exceptionally intelligent, introverted, and non-socially apt. She studies hard to become a doctor like her mother. Ami is especially shy and usually wears glasses while in public, even though she does not need them.

Sailor MercuryEdit


Sailor Mercury


  • Weapons
    • Sailor Star Tambourine
    • Ice Sword
    • Mercury Sword
  • Gear
    • Silver Bracelet/Jewelry Star Bracelet
    • Teletia S
    • Crown Passport


Dark Mercury

Dark Mercury was Amy's identity as part of the Dark Kingdom.

The Sailor Senshi began drifting apart after Sailor Venus revealed herself as the 'Princess,' and the senshi began to keep secrets from one another. Kunzite took advantage of the discord and caught Ami alone. When the team begins to drift apart, Ami became anxious. On her walk home, Kunzite confronted Ami in a moment of vulnerability and was enveloped by purple-black energy & left her unconscious. Makoto goes to Ami's house when she doesn't go to school and finds her sick in bed. After she feeds her, Ami convinces Makoto to go to the carousel, where she passed out. In Act 21, Makoto & Motoki took Ami to the hospital, where she disappears in black petals. Sailor Jupiter fights Kunzite, who has Ami and when Mars and Moon arrive, Ami's Henshin Bracelet was changed, and she transformed using the phrase 'Dark Power, Make-Up.' Sailor Mercury was infused with the power of Queen Metalia by Kunzite and turned evil.

She wields a sword fashioned from an icicle, which she creates herself the first time her transformation is displayed. This causes drastic personality changes as well as the alterations to her uniform. She is self-confident to the point of egotism. Evil Ami, dressing predominantly in black, tends to move about slowly and sadistically, and when confronting the Senshi gives her a sense of sadistic glee. Ami even brainwashed all the students at Juuban, including Naru to antagonize Usagi. Despite these alterations, certain aspects of the real Ami still remain. She still wants to do well in school, and wants friends, hence the brainwashing of her classmates.

Dark Mercury had no intention of being a follower to anyone, and was always trying to pursue her own agenda, which is to kill her former friends and become as strong as possible. She shows blatant disrespect towards Kunzite and even to Queen Beryl, perhaps because, unlike even the Shitennou, she had been directly exposed to Metalia's power during her conversion, as opposed to having Queen Beryl or someone else filtering it. While in the Dark Kingdom, Dark Mercury demonstrated kindness towards a very distressed Nephrite. She seemed to have a bit of a soft spot for him, despite her occasional jab at him. She even repaired his cape when it got damaged in a fight between he and Kunzite. She stated that she doesn't like to see him alone.

Dark Mercury spent much of her time attempting to destroy Sailor Moon. Mars, Moon, and Jupiter were reluctant to attack their friend, as dark as her powers had grown. Sailor Venus believe it was their duty to fight Dark Mercury, but they were still reluctant. Sailor Moon frequently attempted to heal her friend with the Ginzuishou. This allowed "normal" Ami to emerge temporarily. Unfortunately, Mercury is always snatched away before it could be completed, but it has some effect, ultimately resulting in her recovery. Dark Mercury defeated Sailor Moon in battle in Act 28, but the trauma of seeing her injured friend due a near fatal blow caused her to realize she cares about Usagi, and to remember who she really is. Enraged at losing his pet, Kunzite tried to kill her but was stopped by Nephrite, as a favor for repairing his cape. After being healed, she didn't recall anything she did as Dark Mercury. This haunts her, as she becomes terrified of what she may have done to her friends, even though it wasn't under her control.


  • Weapons
    • Dark Sword
  • Gear
    • Dark Jewelry Star Bracelet
    • Teletia S

See AlsoEdit

  • Amy Mizuno - Sailor Mercury in the metaseries Bishoujo Senshi Sailor Moon.