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"Protected by Neptune, the Outer Planet of the Seas, Guardian of the Deep Sea. I am Sailor Neptune. "
— Sailor Neptune's stock introduction


Michiru Kaio (海王 みちる, Kaiō Michiru) is the civilian identity and the present-day incarnation of Sailor Neptune (セーラーネプチューン, Sērā Nepuchūn).

Quick Answers

What is the meaning behind Michiru Kaiou's name in Sailor Neptune (Crystal)? toggle section
In Sailor Neptune (Crystal), Michiru Kaiou's name carries a distinct meaning. 'Michiru' translates as 'to rise', while 'Kaiou' signifies 'Sea King', a reference to the planet Neptune's Japanese name, 'Sea King Star'. This name is linked to Neptune, the Roman sea god. Hence, her full name implies 'Rising Sea King'.
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What are the powers of Sailor Neptune in the Sailor Moon series? toggle section
In the Sailor Moon series, Sailor Neptune, or Michiru Kaiou, is the Guardian of the Deep Seas. She wields control over seas and oceans, molding them into various shapes and forms, and draws power from her homeworld, Neptune. Her abilities include foresight and the use of her Deep Aqua Mirror to debilitate enemies, expose hidden truths, and create a robust teal-shaped shield. She can also generate powerful hypersonic waves or violent tsunamis with her violin.
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What is the relationship between Sailor Moon's Haruka and Michiru? toggle section
Michiru Kaiou, known as Sailor Neptune, and Haruka Tenou are romantically involved in the Sailor Moon series. Their bond is deeply rooted in their shared commitment as Sailor Soldiers. Their dedication to their mission is so profound that they are willing to sacrifice their own lives, even to the point of one killing the other if they possess a talisman. Their relationship is a complex blend of romance, companionship, and shared responsibility.
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How is the 'crystal' element incorporated in Sailor Neptune's character? toggle section
The 'crystal' element in Sailor Neptune's character is manifested through her transformation into Super Sailor Neptune using the Neptune Crystal, a Sailor Crystal provided by Hotaru Tomoe. Guardian Neptune, the guardian spirit of the Neptune Crystal, is another aspect of this element. Sailor Neptune's ocean-themed powers are channeled via her Deep Aqua Mirror Talisman and Marine Cathédrale.
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Who is Sailor Neptune's partner in the Sailor Moon series? toggle section
Sailor Neptune, also known as Michiru Kaiou, partners with Sailor Uranus in the Sailor Moon series. These characters were designed to complement each other, while also collaborating with Sailor Pluto.
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Nomenclature & Etymology[]

Etymology[]

Michiru's name means "to rise" while Kaio means "sea king." Her original English name Michelle a French feminine form of Michel, from the Hebrew name Michael means "Who is like God?"

Appearance[]

Civilian[]

Michiru is an extremely beautiful and delicate-looking girl of slim stature and average height, with deep blue eyes and wavy teal hair that falls just past her shoulders. The epitome of elegance and femininity, she has an excellent sense of fashion, is always dressed smartly, and applying makeup or perfectly made up already. Usagi and Minako are both utterly dazzled by her beauty when they first see her.

Sailor Neptune[]

Sailor Neptune' sailor uniform consists of a white, chest-armored leotard with three white shoulder pads, a dark teal sailor collar with no stripes, a dark teal choker with a golden gem with golden accents attached to it, a dark teal skirt with a white puffy belt sat above it, and a dark teal bow at the chest and a dark teal bow at the back of her skirt with a dark green circular brooch at the center of her chest bow. She wears a pair of lace-up loose dark teal high heels, white wrist-length gloves with three dark teal arm fittings at the ends. A golden tiara with a dark green, oval-shaped gem at its center on her forehead and she has gold studs and has a planetary object surrounded by a ring dangling from them like her own guardian planet.

Super Sailor Neptune[]

As Super Sailor Neptune, she wears an upgraded version of the Sailor Neptune sailor uniform. The sailor collar now features one white stripe, her choker has a yellow star with a dark green gemstone in the center attached to it, the shape of her brooch at the center of her chest bow is now a dark green heart, her gloves reach just below her elbows, the back waist bow is enlarged and lengthened, and the shoulder pads are more wing-like and translucent.

Eternal Sailor Neptune[]

As Eternal Sailor Neptune, her sailor uniform changes completely. Her leotard no longer has chest armor, her shoulder pads are replaced with short light teal bubble-like sleeves with two dark teal fittings at the ends; they have somewhat of a translucent aspect to them, her choker is v-shaped with a yellow star in the center, her skirt now consists of two layers; dark teal on the top and light teal on the bottom. Her belt is now made up of two ribbons, the top one being dark teal and the bottom one being light teal, her brooch at the center of her chest bow is dark green and star-shaped, and her back bow is light teal and is back to its original size with narrow, long, dark teal ribbons extending from it down to her knees. She wears a pair of white knee-length boots that have larger heels and dark teal v-shaped borders at the top that have yellow stars in the center, her gloves now have dark teal, v-shaped wristbands and are extended to reach her upper arms, the gemstone in the middle of her tiara is dark green and star-shaped. and she has a dark green star dangling from a single gold stud.  

Princess Neptune[]

As Princess Neptune, she wears a dark teal strap dress with light teal cloth that goes past her feet and a dark teal choker that is tied into a ribbon at the back with the streams running down her back. She has a gold necklace and her straps have three gold ornaments each. Her necklace and ornaments each have dark teal gems in them and she wears small dark teal stud earrings and dark teal high-heeled shoes.

Personality[]

Michiru is a young woman of high intelligence, wit, and beauty. She is the girlfriend of Haruka and spends most of her time with her. She is also a student at Mugen Academy. She enjoys playing on her violin and hopes to become a professional violinist one day. Her other hobby includes painting the scenery of the sea and beaches.

Information[]

Sailor Moon Crystal Season III[]

Michiru is first seen passing Mamoru, who bumps into her and knocks her hand mirror to the ground. She did not take offense but wonders whether he was a prince in his previous life, which surprises Mamoru. She explains that her mirror has the ability to reveal one's past life. She soon leaves with Haruka. Later that night, Usagi hears a violin in the distance and goes to investigate, which causes Michiru to stop her melody. She stares at Usagi coldly and warns not to interfere.

A couple of days later, Michiru sees Chibiusa come to visit Hotaru Tomoe to return her handkerchief to her. Later that evening, she and Haruka see Chibiusa make a pinky promise to Hotaru. After Chibiusa leaves they find her alone and offer to take her home in their helicopter. When asked whether she, too, has an amulet, she shows Chibiusa her mirror; saying it is her own special treasure called a talisman. The next day, Michiru offers two tickets to Mamoru to go and watch her play her violin at a concert. She plays beautifully until she detects evil nearby and leaves the stage.

In Act 29, Sailor Neptune uses Deep Submerge to save Sailor Chibi Moon from Mimete's Charm Buster attack and finally reveals herself and what she represents as a Sailor Guardian of the Outer Solar System. Some days later, she reappears alongside Sailor Uranus and Sailor Pluto and bow down before Sailor Moon, who has become Princess Serenity. She is hypnotized by Cyprine and is forced to fight against the Inner Guardians.

After being released by Sailor Moon, she is surprised to see her Deep Aqua Mirror resonate with the Holy Grail, enabling Sailor Moon to become Super Sailor Moon. She admits that her talisman has only reacted in such a way once; back when Silver Millennium was on the verge of annihilation at the hands of Queen Metalia. It resonates to awaken the last Sailor Guardian, Sailor Saturn. Agreeing with Sailor Uranus' plan to kill Hotaru to prevent the Guardian of Ruin and Rebirth from awakening a second time, she leaves to go the Hotaru's home. She is shocked to see Sailor Chibi Moon go in; just as Hotaru is being fully taken over by another female entity that she comes to realize is not Sailor Saturn but someone else altogether. She is unable to save Chibiusa's Silver Crystal and spirit from being taken by Mistress 9.

She leaves Usagi's disheartened team and goes with Uranus and Pluto to prevent Mistress 9 from achieving her evil goals and the awakening of Sailor Saturn by destroying Hotaru. Noticing that the four Inner Guardians are in trouble, she uses Submarine Reflection destroying the Witches 5 once and for all. She checks to see if they are alright and says she came to help because she is also a Sailor Guardian. Her connection with the others has caused the Holy Grail to appear and for Sailor Moon to evolve into her Super form. Neptune then goes with Uranus, Pluto and Super Sailor Moon to find Hotaru. She assures Super Sailor Moon that she, too, feels alone and insecure as she was always far away from the people of the Moon Kingdom, but simply seeing the forms of her dear queen and princess was enough light to guide her forward. The elevator picks up speed and she is confronted by Soichi Tomoe, who says that his Daimon are hungry. While holding some off, she urges Super Sailor Moon to get her scepter. She saw Super Sailor Moon reluctantly destroy the vile being that had once been Hotaru's father. As Mugen Academy starts to break apart, she is saved from the debris by Sailor Pluto using her Garnet Orb to create a triangular shield around them.

As Mistress 9 began to grow more powerful, Sailor Neptune runs towards her and uses her mirror to enshroud Mugen in a dome-shaped barrier, vowing to defend the world that gave birth to her new queen. To maintain the shield, she is unable to help Sailor Moon stop Mistress 9 from absorbing the spirits of the Inner Guardians, but shows relief when they are returned by Hotaru's brave consciousness. Unfortunately, the shield is eventually broken by Pharaoh 90 and she fell. She is glad to see Sailor Chibi Moon, safe and sound, attacking Mistress 9 directly. Neptune lends her strength to the Holy Grail but is astounded when an additional Holy Grail appears before Sailor Chibi Moon, who uses it to evolve into her own Super Sailor form. When the combined attacks of Super Sailor Moon, Super Sailor Chibi Moon, the Inner Guardians, and Tuxedo Mask all failed, she watches helplessly as their strength is sapped from each of them.

As Pharaoh 90 grows in both size and strength, she suddenly notices the Deep Aqua Mirror glowing aqua-green. She watches as a purple glowing orb of light rises up, revealing the Guardian of Ruin herself. Sailor Saturn says she must swing down her Silence Glaive, Neptune immediately expresses her horror for the scythe of the Goddess of Death. However, she could do nothing as Sailor Saturn unleashes her strongest and most deadly attack yet-Death Reborn Revolution- and begins obliterating all of the traces of Pharaoh 90 and the world by swinging down her Silence Glaive on its sharp edge.

Sailor Moon Eternal[]

While Michiru is performing at the concert in Vienna, Austria, she feels the dark presence of the Dead Moon Circus and is shocked when she can’t transform at all.

Sailor Moon Cosmos[]

Sailor Guardian Info[]

She possess certain mystical abilities related to the seas and the future; psychic abilities that are somewhat similar to those of Rei. By psychically feeling the roughness of the sea, she can tell whenever there is danger near or see vivid visions of what's to come.

She can also utilize her hand-sized magic mirror to see another's past life, uncover the weaknesses of adversaries or see certain magical beings or reveal hidden locations.

Her powers are much stronger when she is transformed into the Guardian of the Deep Seas.

Sailor Neptune has the power to control and manipulate the seas and oceans and mold them into varied shapes and forms, as well as draw strength from her own homeworld of Neptune. She has the ability of foresight.

Using the Deep Aqua Mirror, she can weaken enemies, reveal enemy hideouts and hidden truths, and erect a strong teal-shaped shield. She can even use her violin to emit unusually strong hypersonic waves or even violent tidal waves or tsunamis to wash away her enemies in one sweep. Her mirror can be used to create a very strong dome-shaped shield in conjunction with the other two talismans.

Phrases[]

Attacks[]

Items[]

Gallery[]

Trivia[]

  • Michiru appears in the ending credits alongside Haruka, holding her Deep Aqua Mirror.
  • Unlike her 90s anime counterpart, her earrings are in the shape of tiny Neptunes. Also, her miniskirt is not the same turquoise as her signature color.
  • She appears along with Sailor Uranus in the opening of the third season; holding her mystical hand-mirror.
  • She is a major supporting character throughout the Infinity arc and in contrast to her depiction in the first anime, continues to be one in the Dream and Stars arcs.
  • Her sea/ocean-based attacks and abilities are not the same as Sailor Mercury's water-based abilities; though they are both liquid elements.
  • Her Deep Aqua Mirror retains the same appearance as it had in the manga.
  • She is one of the three Outer Sailor Guardians who possess one of the Talismans required to awaken Sailor Saturn.
  • In Sailor Moon Crystal, red and white roses appear in the backdrop of Sailor Neptune's signature pose as she gives her introductory speech.

References[]