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Characters / Sailor Moon Michiru Kaioh

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Michiru Kaioh/Michelle — Sailor Neptune
Click to see Michiru Kaioh. 
Click to see her in the 90s anime. 
Click to see Super Sailor Neptune. 

Voiced by: Masako Katsuki (first anime), Sayaka Ohara (Crystal onwards) (Japanese); Barbara Radecki (Cloverway), Lauren Landa (Viz) (English); Irma Carmona (Latin American Spanish, original/Crystal); Márcia Regina (Brazilian Portuguese); Olga Lima (European Portuguese)
Portrayed in the musicals by: Kaoru Ukawa, Chikage Tomita, Miyuki Sena (Miyuki Fuji), Yūko Harada (Yūko Tahara), Sara Shimada, Yūka Asami, Tomoko Inami, Takayo Ohyama, Sayaka Fujioka

"Likewise, Sailor Neptune acts with grace!"

Uranus' classically refined girlfriend, a talented violinist and swimmer. Her poise and elegance coupled with her surprisingly friendly demeanor make her an immediate inspiration to the Guardians. Despite her graceful manners, she's no less merciful than her girlfriend towards those who get in her way.


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  • The Ace: To perhaps a greater extent than Haruka, as she's considered to be the feminine ideal: sophisticated, cool, and artistically talented. She's wealthy enough to own a Stradivarius and attend an elite academy, has great artistic talent in many areas, athletic in civilian and guardian form, and is leagues more powerful than the inner soldiers. In the manga, Usagi, Ami, Rei, and Makoto frustrate Minako (the original ace) by gushing about how awesome Haruka and Michiru are. She's witty enough to fluster the normally suave Haruka, and intelligent enough to manipulate Seiya into letting his guard down by charming him.
  • Adaptational Jerkass: The same as Haruka
  • Adoptive Peer Parent: Is "Michiru-Mama" to young Hotaru after she's been orphaned, co-parenting with Haruka and Setsuna.
  • Aloof Ally: With Uranus towards the inner soldiers in that they are too idealistic and refuse to use lethal force.
  • Alpha Bitch: She is introduced as one in the manga, but this is just a front. She's more of a normal Ojou with small shades of Lovable Alpha Bitch.
  • Always Save the Girl: In one of the ‘’SuperS'' specials, an enemy is stealing Haruka’s life energy and bluffs Michiru into choosing between saving Haruka and saving the world. Michiru calls his bluff and saves her, stating that to her, a world without Haruka isn't worth saving.
  • Amateur Sleuth: When not fighting, she and Haruka often investigate suspicious activity rather than getting caught up in it like so many other characters. For example, they enrolled in Mugen Academy to get to the bottom of the strange things happening there.
  • Ambiguously Absent Parent: Like Haruka's parents, hers are never even mentioned. Obviously, their parents must have existed at some point for them to be reborn, but that's all we know.
  • Ambiguously Bi: Michiru is openly gay and in a relationship with Haruka, but is known to flirt with men, particularly Mamoru.
  • Astonishingly Appropriate Appearance. Sea green eyes, check. Sea green hair that has a slight wave to resemble ocean waves, check. If it wasn't obvious enough she's a water user.
  • Badass Bookworm: An established violinist, whose swimming ability is just as remarkable, and it becomes a surprise that Ami is able to keep up with her during a race. Also, during her fight with Sailor Moon, she easily restrains her, and the Sailor Stars opener shows that Michiru is quite capable of getting physical.
  • Badass Teacher: Besides being a powerful warrior, the first anime series shows her working as an art teacher.
  • Ballet: Someone as wealthy and graceful as she is must've had a lot of training in her youth, and her footwear as Sailor Neptune bears a striking resemblance to pointe shoes.
  • Battle Couple: With Uranus. They usually arrive together and attack enemies in tandem.
  • Beauty, Brains, and Brawn: The beauty to Setsuna's brains and Haruka's brawn.
  • Break the Badass: She and Haruka pretend to defect to Galaxia to gain her trust, but doing so they kill Pluto and Saturn by removing their Star Seeds. Then, when it turns out that Galaxia doesn't have one to remove, they break down and realize it was all for mothing.
  • By the Power of Grayskull!: "Neptune Planet Power, Make up!", "Neptune Crystal Power, Make up!"
  • Collector of the Strange: She collects cosmetics. Granted, someone like her would make good use of them, but it's odd that she's mainly interested in them as collectibles.
  • The Comically Serious: Sometimes.
  • Cool Big Sis: To the Inners. She is regarded as the feminine ideal.
  • Cultured Badass: A fine classical violinist and painter who kicks plenty of evil ass.
  • Curtains Match the Window: Aqua eyes, aqua hair, even has an oceanic trend.
  • Custom Uniform: She and Haruka have short gloves instead of elbow-length ones.
  • Deadpan Snarker: She loves making sarcastic, thinly veiled comments behind a graceful smile about others all the time.
  • Depending on the Writer: Depending on the episode in the S season, she can be more contemplative or merciful than Sailor Uranus, or just as extremist and rude like her.
  • Did You Think I Can't Feel?: In the earlier days of their relationship before they became a couple, Michiru did not appreciate Haruka's patronizing attitude about what she's capable of. This was after Haruka saw a portrait Michiru created of the end of the world, with Haruka snarking she didn't think a privileged rich girl like her could possibly understand a concept as bleak as the apocalypse. Michiru makes it clear Haruka had no clue what she was talking about.
  • The Dividual: With Uranus; They were created as a pair, never get solos in the Sera Myu, instead getting duets, and the scenes they have solo can be counted on one hand. The 90's anime forcibly separates them for a single episode, instead pairing her with Mars.
  • Does Not Like Spam: Dislikes kikurage mushrooms.
  • Early-Bird Cameo: Possibly in episode 44 of the first season. When we see how Mamoru and the girls were reincarnated, several other people from the Silver Millennium (presumably other members of the princess' court) are shown to have come with them. The only one shown as more than a silhouette is an extra Sailor Guardian who looks a lot like Michiru. The episode's animation director Hisashi Kagawa eventually revealed on Twitter in 2019 that it was a coincidence, since he didn't know yet that Michiru would even exist in the series, and that he inserted the character just because he expected it more Sailor Guardians to show up later. Fans still accept that it's Michiru, though.
  • Elegant Classical Musician: A very elegant young lady, and a professional violinist who also plays the piano.
  • Elemental Hair Colors: Her blue-green hair indicates her power over the sea.
  • Even the Girls Want Her: While she doesn't have quite the universal lady-appeal of Haruka, both Ami and Rei (among others) think she's beautiful.
  • Everyone Has Standards: She's a gleefully unrepentant troll, albeit an elegant one, but there are some things Michiru won't joke about.
    • When Usagi is upset because she thinks Mamoru forgot her birthday (he didn't, he just didn't know when it was because Usagi never told him), Michiru sounds truly disappointed in him, and is none too pleased when Haruka jokingly flirts with Usagi. Michiru might screw with Haruka sometimes by flirting with others, but she draws the line at teasing someone who's emotionally vulnerable at the moment.
    • After the guardians become trapped in a dimensional warp created in the Tomoe household, Haruka says it would be better if they didn't come back. Michiru is seriously offended by such a notion.
  • Fake Defector: In the final episodes.

  • The Gadfly: Michiru just loves to innocently screw with people by making veiled comments hiding behind an innocent smile. She goes around making comments for the sake of screwing with people and watching their reactions when they finally get what she's really saying. For example, when she's paired up with Rei in the first Stars arc of the anime, she nonchalantly comments about her relationship with Usagi:
    Michiru: You two are close, huh? Quite similar to Uranus and me.
    • An earlier moment comes in S when Makoto asks about Haruka being able to drive. Haruka stammers that she got a license overseas, and Michiru just mentions "So she says."
    • Throughout Stars she loves to tease Haruka about her rivalry with Seiya, even telling the girls that Haruka doesn't hate men, she just hates popular men (implying she hates Seiya because he's more successful with girls).
  • Girly Bruiser: Michiru is very feminine, collected, cultured, and soft-spoken. She likes to wear long, flowing dresses and is interested in classical music, painting, and reading. She's also a balance of Lady of Black Magic and Lady of War with her water-based attacks and Stradivarius, and the 90s anime show her inflicting a brutal beating on Germatoid clones with her bare hands.
  • Girly Run: Clearly seen when running from Usagi in Season 3, Episode 6 of Crystal.
  • Good Counterpart: The notes in Naoko's materials collection describe her as being "like Esmeraude became calm."
  • Good Is Not Nice: In the 90s anime, Haruka and Michiru are very cynical, trying to kill Hotaru in an attempt to stop Saturn from ending the world. Even after Usagi manages to both save Hotaru and the universe, they still are aloof. In the Stars arc, both act as Double Reverse Quadruple Agents for Galaxia, even killing Saturn and Pluto to prove their loyalty. However, they are also Wrong Genre Savvy and end up dying themselves. They have good intentions, but also believe that the ends justify the means and thus do not hesitate to resort to violence or trickery. They are are much nicer in the manga.
  • Good Is Not Soft: Though Neptune is undoubtedly on the side of good, she is the most ruthless of the Sailor Guardians, and the most willing to Shoot the Dog if she feels that there is no alternative. She was at her most brutal when she was working solo; Uranus is the one holding back the worst of Neptune's impulses.
  • Have I Mentioned I Am Heterosexual Today?: Same deal with Sailor Uranus. In one scene in the old English dub when the girls are talking about first kisses, Michelle reminisces about having her first kiss with "Brad, the cutest boy at school." Then she and Amara exchange meaningful looks and hastily exit the scene.
  • Hero of Another Story: She and Haruka are usually living their own adventure while the protagonists are in Tokyo. In the anime they even leave after the third season specifically to do this.
  • High-School Sweethearts: With Haruka.
  • Ignorant of Their Own Ignorance: Uranus and Neptune in the anime refused to work with Sailor Moon and the Inner Guardians because they believed they were too idealistic for their own good and couldn't make pragmatic decisions. After the battle with Pharaoh 90, they scold Usagi for protecting Hotaru which almost led to the planet being destroyed and say she is unfit to be queen. However, Uranus and Neptune were rookie soldiers without the experience of fighting various enemies Sailor Moon and her guardians had (judging by the information and flashbacks from the anime, they were active for roughly a year, with the Death Busters as their only threat to investigate). Examples of their behavior include:
    • If Uranus and Neptune were as pragmatic as they believed they were, they would've teamed up with the more seasoned girls who had among them a national genius girl with a handheld supercomputer that's suggested to be more advanced than modern day appliances (Ami), a psychic girl who could've figured out who held the Talismans by divining through the Sacred Fire (Rei), and a girl with a legendary crystal that has the capacity to heal/destroy an entire planet, purge evil from a person or place, and bring the dead back to life (Usagi). Granted, Uranus and Neptune might not have known about their previous missions to know they're capable, but since Sailor Moon and the Inners started picking up notoriety after they awakened (to the point of having little dolls made in their image and kindergarteners knowing about them in R) and Pluto let them know that Chibiusa was the Princess of the Future Silver Millennium, it's hard to believe that they wouldn't have heard of their exploits through the news or word of mouth, or that Pluto wouldn't have told Uranus and Neptune about them herself.
    • After Eudial calls them to let them know she has found a Talisman, Haruka and Michiru call Usagi to meet them, tell her they won't let her slow them down with her "half-baked play war" and even take away her brooch... with the Silver Crystal inside. What Haruka and Michiru both failed to realize was that their plan for finding the Talismans had been rather half-baked. In spite of the time they spent investigating them, they were just piggybacking off the enemy's efforts: they just sat around and waited for the Death Busters to strike, remove a victim's Pure Heart, then check to see if it was a Talisman. At no point did they try to find them themselves. Eudial had to call and tell them that she found a Talisman. And at no point did they think she could have been leading them into a trap. They just rushed to meet Eudial without coming up with a plan other than collecting a Talisman for their mission.
    • Regarding Hotaru, they were hell-bent on killing her because she was the reincarnation of Sailor Saturn and they believed she would destroy the world when she awakened, yet they were unaware of her true purpose (to destroy the world only when things were at their lowest point so everything could be reborn anew) and would've killed an innocent girl and valuable comrade had they succeeded.
    • Finally, if Uranus and Neptune had teamed up with the girls and shared what they knew about the Death Busters (admittedly, something Neptune had suggested to Uranus who refused her), the issue would've been resolved quicker with far less conflict, but instead they were aloof and condescending towards them and even hindered them on several occasions. Even Tuxedo Mask said that while the Outer Guardians are strong, Sailor Moon is stronger because she has teammates.
    • In short, while Uranus and Neptune were smug and condescending towards Sailor Moon and the Inners for their beliefs, it was their aloof behavior, hasty decision making, and inability to cooperate and share meaningful communication that often led them to make things worse and cause unnecessary conflict.
  • I Have the High Ground: She and Haruka are fond of this.
  • Immune to Bullets: Eudial's death trap triggers bullets that fly from every direction. Neptune gets hit with every single one, until the guns are out of ammo. She survives, if only for a few moments, and it takes a blast from Eudial herself to finish her off and rip out her Pure Heart Crystal.
  • Improbable Weapon User: Some of her attacks use a mirror or a violin.
  • Incest Subtext: The Cloverway dub creates an interesting inversion with Haruka and Michiru. The romantic subtext is meant to be there... but they're not supposed to be cousins in the original. The company that decided to make them cousins did so for the exact reason of preventing there being any openly gay people in the show, without actually changing enough other stuff to even try and hide how they feel for each other, just hoping no one would think it's odd for two cousins to be THAT devoted to each other.
  • Ineffectual Loner: She and Haruka have a consistently condescending view of many of the other characters, despite being surprisingly useless when combating actual Dragons or Big Bads.
  • Informed Attribute: Is thought to be more pragmatic than the Inner Soldiers, yet her decisions say otherwise. See Ignorant of Their Own Ignorance above for more details.
  • Jerk with a Heart of Gold: Michiru in the original manga only acted like a jerk to protect the Inners from what she viewed as a failure in their duty, and she was in fact a person with a Hidden Heart of Gold. She's capable of great kindness but hides it with her aloofness and a sharp tongue.
  • Lady of Black Magic: Refined and classy, she uses water-based attacks and a Magic Mirror that can dispel illusions and teleport people.
  • Lady of War: She's an elegant, refined young lady who will defeat enemies by whatever means possible. She even uses a violin to blast enemies to oblivion. The femme counterpart to Uranus' butch.
  • Lap Pillow: Haruka rests her head in Michiru's lap in this manga spread.
  • Lightning Bruiser: Not to the extent of Uranus but in the Nehelenia arc, the entire team of 10 is split up into abnormal groupings by the villain, splinting up Uranus and Neptune. The former, paired up with Mercury, notes she never noticed how well Neptune had managed to keep pace with her high running speed until now, having been paired with someone who can't.
  • Lipstick Lesbian: The elegant, lady-like girlfriend of the more masculine Uranus.
  • Love Makes You Evil: Subverted. She and Haruka make Galaxia think they'll defect to her as long as they can be together, but it's part of a plan to overthrow her. It doesn't work.
  • Magic Mirror: The Deep Aqua Mirror. It acts as a weapon, can dispel illusions, allows communication over great distances, and can even teleport people.
  • Making a Splash: A powerful user of water. Her powers are stated to be from the sea rather than just regular water.
  • Martyr Without a Cause: Like Uranus, Neptune strongly believes that victory is impossible without some horrible angsty sacrifice that only they have the moral strength to make.
  • Masculine–Feminine Gay Couple: Michiru is a refined, violin-playing Lipstick Lesbian while her girlfriend Haruka is a short-haired, athletic, sword-wielding Butch Lesbian.
  • Meaningful Name:
    • Kaioh as in Kaiōsei, the Japanese name for Neptune meaning "sea king star".
    • Her given name means "rising".
  • Morality Pet: Always to Haruka
  • Ms. Fanservice: Swims a LOT. Which means we get to see her in swimsuits a LOT.
  • Musical Assassin: With a Stradivarius!
  • Mysterious Past: The only thing we know of her past is that she's the only Sailor Guardian who got her powers and Awoke without external help (she simply dreamed of her past life), and even that comes from Word of God. Everything else, is completely unknown.
  • Never My Fault: Michiru and Haruka solely blame Usagi for the way the conflict with Pharaoh 90 ended due to her protecting Hotaru, even though their aloof behavior, hasty decision making, and inability to cooperate and share meaningful communication contributed to the outcome of the battle just as much as Usagi's actions did.
  • No One Could Survive That!: Neptune gets hit with every single bullet from Audial's death trap and somehow survives.
  • Ojou: It's never stated who her parents are but she's clearly wealthy, as she owns a Stradivarius violin and a gigantic condo with its own aquarium and is a world-famous violinist and painter.
  • Opposites Attract: With Haruka. She is a cultured and elegant lady, Haruka is a sporty tomboy.
  • Out of Focus: In SuperS, hers and Haruka's only appearance is in one of the specials, although they return to full-time characters in Stars.

  • Passive-Aggressive Kombat: Basically every single thing that has come out of Michiru Kaioh's mouth is this. If Usagi is going to be the queen of the moon, Michiru is definitely queen of the trolls.
  • Princess Classic: Subverted. She lacks the innocence of a typical Princess Classic, but she's probably the closest thing to one on the Sailor Team in present day.
  • Proper Lady: A mature, high-born, sophisticated, refined, elegant woman who plays the violin.
  • Red Oni, Blue Oni: The Blue to Haruka's Red. While both had the same intentions in season 3, Michiru's demeanor was calm and introverted in comparison to Haruka's more outgoing and harsh attitude.
  • Related in the Adaptation: In the Cloverway dub, she and Haruka were infamously stated to be cousins to Hide Your Lesbians. But the dub didn't edit out their flirting scenes, so not only did they look like lesbians, but also incestuous ones. The dubbers apparently thought they could make their affection look familial instead of romantic.
  • Renaissance Man: Aside from being one of the better fighters on the team, she aces all her classes in school, is an accomplished concert violinist and gifted painter, can fly a helicopter, has the certification to work as a teacher and is a champion-level competitive swimmer.
  • Rich Idiot With No Day Job: She and Haruka have shades of this. They seem to be independently wealthy, with nobody suspecting that they're Sailor Guardians.
  • Right for the Wrong Reasons: She was right that Hotaru was a threat to Earth, but it wasn't for the fact she was Sailor Saturn rather because she was the vessel for Mistress 9.
  • Schoolgirl Lesbians: With Haruka.
  • Second Place Is for Winners: In Episode 97 of the first anime she's offended when Ami intentionally throws a swimming race as she wouldn't have minded losing against someone who was giving it her all vs. a win being handed to her.
  • Shoot Your Mate: During their deception of Sailor Galaxia, she and Haruka are forced to remove Pluto and Saturn's Star Seeds to keep up the charade.
  • Silk Hiding Steel: While considerably more feminine and graceful than Haruka, it's obvious that Michiru has a will of pure steel. It's strongly hinted that she's the one with the reins in their relationship, and she could have Haruka wrapped around her finger if she wanted to.
  • Smug Super: Along with Haruka. In their civilian guises, they seem friendly enough but their arrogance comes out when they transform.
  • Spotlight-Stealing Squad: After Haruka and Michiru are introduced, they take the focus away from Ami, Rei, Makoto and Minako, who are little more than Usagi's support during the Infinity arc, although the four get back in the spotlight during the Dream arc.
  • Stalker with a Crush: It is heavily implied in episode 106 that Michiru was one of these to Haruka going way back before she even knew that Haruka was destined to become Sailor Uranus.
  • Sugar-and-Ice Personality: She is very calm, cool and collected, as well as extremely dedicated to her mission...but she can also be very gentle to those she loves (if in a very princess-like way, befitting an Ojou like her), particularly her girlfriend, Haruka.
  • Taking the Bullet: In the backstory episode of Uranus and Neptune in the 90's anime, she leaps in front of a monster about to attack Haruka, causing herself to be heavily injured.
  • Town Girls: The Femme to Setsuna's Neither and Haruka's Butch.
  • Trademark Favorite Food: Sashimi.
  • Troll: In contrast to her elegant demeanor she's a huge one. She's not malicious or evil, but the moment she says "Ara" expect the conversation to be full of innuendo and oh-so-innocent snarking.
  • True Blue Femininity: She's color-coded with turquoise and blue, and the Lipstick Lesbian to contrast with Sailor Uranus' butch. Not to mention that her hair is blue too. (Well, more of a sea green, but close enough)
  • Undying Loyalty: Obviously to Usagi/Princess Serenity, as is the case with all other Sailor Guardians, but more notably, to Haruka. She survived a barrage of bullets to reach Sailor Uranus and protect her from Eudial. She'll even casually risk the world being destroyed so long as Haruka is safe with her, which even surprises the villain attacking Haruka.
    Sailor Neptune: There seems to be a misunderstanding... The world is only worth protecting if Haruka is living in it.
  • Unskilled, but Strong: While Uranus and Neptune have some skill, they don't have the experience Sailor Moon and the Inner Guardians have (and are implied to have awoken as Soldiers a few months after the Black Moon Clan's final attack/before the Death Busters struck when they received visions of the world being destroyed by The Silence), yet their magical attacks are stronger than the Inners to better suit their responsibilities of keeping outside threats from attacking Earth.
  • Unwitting Instigator of Doom: With their refusal to cooperate with the other guardians (who have more experience than them) and their belief that only they have the moral strength to make hard choices, she and Haruka tend to make Wrong Genre Savvy decisions that make things worse, like their Fake Defector scheme in the Grand Finale where they end up sacrificing Setsuna and Hotaru for nothing.
  • Vanity Is Feminine: She's the most feminine of the group and takes pride in her appearance. It's appropriate that she gets a mirror as a weapon.
  • Verbal Tic: "Ara" in the 90s anime.
  • Violently Protective Girlfriend: The whole deal with Eudial was triggered when she first took a hit for Haruka and got captured... and upon seeing Haruka coming to rescue her and fight Eudial, releasing herself and trying to stop her.
  • Walking Swimsuit Scene: Swims so much it kind of comes with the territory.
  • Water Is Womanly: A very sophisticated young lady, conducting herself gracefully and being a classical violinist and painter. She has wavy sea green hair resembling waves. And as Sailor Neptune, she has powers over water that come from the sea.
  • Well-Intentioned Extremist: See Anti Heroine above. This is mellowed a bit by working with the inner soldiers, but Uranus and Neptune still occasionally resort to more extreme tactics. Of course, this being an idealistic series, they are usually proven wrong about said tactics being necessary.
  • What the Hell, Hero?: Along with Haruka, Michiru chastises Usagi for her idealism and protecting Hotaru (or rather, her body, which had already been taken over by Mistress 9), which almost doomed the whole world.
  • Wise Beyond Her Years: Despite being only 16 when first introduced, Michiru is easily the most mature and refined of the guardians.
  • Wrong Genre Savvy: From the way she and Haruka are utterly convinced that victory requires sacrifice, their tactics in battle, and their claim that Usagi's ideals are childish, they act like they're living in a war drama, not a Magical Girl series.
  • Yamato Nadeshiko: Although mainly an Ojou, but she also shows strong vibes of this in her devotion to her girlfriend Haruka and their Outer Guardians' mission.
  • You Gotta Have Blue Hair: Aqua-favoured.


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