Shadow Galactica (シャドウ・ギャラクティカ, Shadō Gyarakutika) are a group of fictional characters in the Sailor Moon manga series created by Naoko Takeuchi.

Galactica Palace is located at the Galactic Center, in Sagittarius Zero Star, and it is built around the Galaxy Cauldron, the birthplace of all life in the Milky Way.

Sailor Galaxia (セーラーギャラクシア, Sērā Gyarakushia) is an orange-haired human-like female alien and the main villainess of the fifth story arc.

Without feeling any purpose for herself, and lacking satisfaction in the role of a mere Sailor Guardian, Galaxia began to crave power.

Planning to steal the starseeds in the Solar System, Galaxia breaks the seal of Queen Nehelenia to force the awakening of Sailor Saturn.

Galaxia generally employs fewer Animamates in the musicals than in either the manga or anime, but several times she resurrects villains from past arcs.

In Eien Densetsu, Galaxia is successfully purged of evil and sacrifices herself to help the Guardians destroy Chaos, who had been posing as a low-ranking minion.

[5] In the stage musicals, five different actresses have portrayed her: Saori Sara, Tamami Matsumoto, Takemi, Yumie Sakaguchi and Coco Isuzu.

[6] Chaos (カオス, Kaosu) is a primeval entity that has existed since the beginning of the universe and the overarching antagonist of the Sailor Moon series.

In the end, with the help of all of the Guardians, Sailor Moon is able to force it into the Cauldron and everyone who was killed is sent back, each to their planet and time of origin, reincarnated after the battle.

However, Sailor Moon is able to reach the small bit of hope left in Galaxia's own heart, and she releases Chaos from her body.

In the anime adaptation, contrary to their manga counterparts, it is stated by Princess Kakyuu that the Animamates were once true Sailor Guardians.

Eternal Sailor Moon matches them at every turn: she alone has the power to heal Phage and restore star seeds to innocents.

She exhibits a personality both childlike and intense; she usually chooses famous or impressive people as her victims, seems to enjoy her work, and is openly fearful of Galaxia.

Aluminum Siren first appears in Act 44 on the roof of Jūban High School and attacks Usagi and Seiya with Galactica Tsunami.

"[19] She is very polite, ditzy and oblivious when off-duty, and is always eating or feeling hungry; once engaged in battle, however, she drops her flaws and becomes completely ruthless.

She succeeds in stealing their star seeds before Sailor Moon destroys her with Starlight Honeymoon Therapy Kiss attack.

In the anime series, Sailor Tin Nyanko is voiced by Ikue Ōtani in Japanese and by Mariya Ise in the Cosmos film.

The Galactica Troops disguise themselves as Jūban Municipal High School students or as backup dancers for the Three Lights (depending on the musical) in order to observe the Sailor Guardians, and eventually attack them.

In the Cosmos film, Sailors Chi and Phi are voiced by Yuka Komatsu and Fumie Mizusawa in the original Japanese version and by Amber Lee Connors and Lisa Ortiz in the English dub, respectively.

Sailor Mnemosyne is named for the Titaness of memory, the mother of the muses, as well as another river in the underworld which brought remembrance and omniscience.

In the Cosmos film, Sailors Lethe and Mnemosyne are voiced by Shiori Mikami and Kanae Itō in the original Japanese version and by Risa Mei and Megan Harvey in the English dub, respectively.

In the musical Le Mouvement Final, Lethe and Mnemosyne do not appear but their roles are taken by Sailors Lead Crow and Aluminum Seiren, respectively.

In the anime, Galaxia frees Queen Nehelenia from the seal and encourages her to take her revenge by unleashing a nightmare upon the "people of the White Moon".

It is not revealed until the final few episodes that Galaxia contracted Nehelenia into her service for the sole purpose of forcing Sailor Saturn to reawaken her Guardian powers and get a mature starseed, as at the time Hotaru was merely an infant.

This scene is replicated in various musicals and has the song Orleans no Sei Senshi~Uranus-Neptune no Uragiri (Holy Guardians of Orleans~Uranus and Neptune's betrayal) appear in each version.

Her uniform bears a striking resemblance to Galaxia's fully possessed form from the anime, sans wings, and retaining the golden bracelets.

[24] Those who possess "true" starseeds (i.e. the Sailor Guardians and Tuxedo Mask) do not transform into Phage, and if their star seeds are taken, their body fades away killing them instantly.

[26] In a review of the first half of the final season of the anime for Anime News Network, author Rebecca Silverman compared the Sailor Animamates with the Four Kings of Heaven, explaining that while both groups are not similar to each other, the way in which the Animamates pick their victims follows "the standard operating procedure of all Sailor Moon villains—find the most famous or prettiest person and just assume they're who you want, rinse, repeat."

In particular, the author found Iron Mouse as one of the more "endearing" antagonists of the series and wonders why other villains refused to engage with Sailor Moon's speeches the way she did.