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Characters / Land of the Lustrous: The Lustrous

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A character page for the Land of the Lustrous humanoid subspecies we follow for the first half of the series, the Lustrous/Gems.

For everyone else, refer to the Land of the Lustrous characters page.

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    In General 
  • Amazing Technicolor Population: Their skin is actually the color of their alloy. Most days they wear a white powder and resin on their bodies to protect themselves from corrosion, making them look like they have pale skin at the default.
  • Ambiguous Gender: Since they are just gem beings with No Biological Sex, they have no confirmed gender. The English version keeps their dialogue genderless, using "they" and "them" as personal pronouns. In the original Japanese, however:
    • Most gems seem to tend towards using the masculine first-person pronouns of 'ore' and 'boku' to refer to themselves. The ones who don't, only three gems thus far, use the gender neutral 'watashi', due to their more formal way of speaking.
      • Oddly enough, Alexandrite is the only gem to use the first person pronoun ’atashi’, which is strictly feminine. It could be justified since Alexandrite made it known that they want to be seen as “cute” by the other gems. It’s clear that various gendered first person pronouns exist in their world, despite a majority of the gems having a preference for masculine ones and not truly having a concept of gender.
    • When they refer to the older gems, like Yellow Diamond, as their siblings, they use 'Onii-sama', 'Nii-sama' and 'Aniki'. Diamond also referred to Bort as 'Otouto'/'Little Brother' when reprimanding Phos.
    • Diamond, when referring to the younger gems as a collective, referred to them as 'otoutotachi' meaning 'younger Brothers'.
    • When referring to other gems, they use 'Kare' which translates to 'he/him'.
    • Regardless of what first-person pronoun they use, some gems' speech patterns are decidedly more masculine or feminine than others, likely because of their personalities. For example, Jade uses more masculine speech, while Dia tends towards feminine language. Rutile, a doctor, sticks to formal, gender-neutral language.
    • Given a lampshade in Chapter 72, where Barbata addresses Phos as a "crystal lady...or not, I don't know". Additionally, Cairngorm is given the title of "Moon Princess" after they marry Aechmea.
  • Back from the Dead: Able to be revived from shattered pieces if enough parts are put back together.
    • Came Back Wrong: Downplayed; it turns out that, even if it's impossible to put pieces back together, a Gem's inclusions can be used to revive them as a Lunarian, as what happens in Chapter 95.
  • Bizarre Alien Biology: Ambulatory gem formations that arose from fossilized human bones living in a symbiosis with microscopic life known as "inclusions". Every inclusion can hold memories, so their entire bodies are essentially their brains, with any damage affecting memory. The inclusions themselves seem to be photosynthetic like plants, but only require sunlight and can survive in both freezing temperatures and a vacuum. Without enough light, they quickly go dormant, meaning most gems will sleep at night and during winter.
  • Curtains Match the Window: Since they're gem people, their bodies are all made of the same material, so usually the color of their eyes matches the color of their hair. Post-moon migration, Cairngorm is the only exception, given their eyes were replaced with eyes of their gem type while the hair is still scraps of Ghost's hair.
  • Dark and Troubled Past: After a meteor struck the Earth, life was forced to flee back into the seas, though the ones that couldn't get there in time died, with some sinking into the sea. Their bodies decomposed and were turned into "inanimate objects", but over the ages, some of these remains were crystallized and became sentient, thus birthing the Lustrous, who would return to land.
  • Deep Sleep: They all hibernate during winter, since the sunlight becomes so faint. The exceptions are Sensei, who is always sleepy regardless of the weather, and whoever is the Winter Guardian. The Winter Guardian endures the effort of staying awake in low sunlight in order to keep Sensei company in protecting the other sleeping gems.
  • Evil Costume Switch: Eventually, all of the Gems who went with Phos to the Moon switched their old uniforms for thematically similar, but unique white clothing from the Lunarians. Dips into Non-Uniform Uniform as well.
  • First-Name Basis: All of the Gems are like this since they have Only One Name, but after Sensei steps down from his role as leader the Gems begin to call him by his first name as well.
  • Flat Character: Quite a few of the gems are one-dimensional due to the amount of characters in the cast and because most of the events of the story happen directly because of Phos without their involvement.
  • Girliness Upgrade: Following their conversion into Lunarians, almost all of the Gems end up wearing feminine clothing and sporting more feminine hairstyles. While the Gems are and were raised sexless and they have a mixture of masculine and feminine clothing, the feminization is somewhat justified given that the Lunarians simply see the Gems as women anyway.
  • Immortality: The gems are completely immortal. They can live on naturally for seemingly forever, and, if broken, they can wake up as long as they have suitable material. Being taken to the Moon is the closest to death they can reach.
  • Immortal Immaturity: Despite looking like teens physically, centuries old existentially, and educated by Sensei (their guardian), some of the Lustrous still are, on a psychological level, children that can act a lot younger than even their physical forms appear to be.
  • Killed Off for Real: Any gem who gets taken to the moon is treated as this. Later confirmed to undoubtedly be the case, as the Lunarians grind any captured gems into powder and scatter them across the moon's surface. The powder also gets eaten by the captured Admirabilis, lessening chances of revival. However, as per Phos's deal, the Lunarians have agreed to try to synthesize what remains of the gem powder back into full gems, making this fate come into question again for gems that are harder than 4.
    • Averted. Aechmea was lying about several details, and shattered gems' inclusions were ultimately recovered, making it possible to revive them as Lunarians. By the end of Chapter 95, every Gem including Sensei have become Lunarians, effectively extinguishing the species and leaving Phos as the Last of His Kind.
  • Laser-Guided Amnesia: Their bodies are quite literally their entire being, including memories. If any part of it is lost, then part of their memories go along with it.
  • Leg Focus: Given the fact the Lustrous lack busts, butts, and bellies to derive Fanservice from, every one of them are designed with long, shapely, and notably quite feminine legs that frequently get plenty of Male Gaze involving them.
  • Motive Decay/The Dark Side Will Make You Forget: The Gems that went with Phos to the Moon largely forget about the motives that led them to their decision in the first place, preferring to play around with each other and the Lunarians.
  • Mourning Clothes: According to an interview, the uniforms the Gems are wearing are actually funeral attire. And given that Kongou is built to be a monk that passes the dead on, it brings their whole culture to a new meaning.
  • Noodle People: The mangaka draws the gems as really thin humanoids with long legs.
  • No Biological Sex: They have no genitals or other physical sex characteristics.
  • Non-Humans Lack Attributes: Zigzagged; on the one hand the gems are sexless and, as shown with Euclase when they strip down in chapter 8 in order to get covered in the anti-salt resin, they don't appear to have visible genitalia. But they still have asses and Euclase gets embarrassed when another gem sees them naked. It's a wonder if they actually have anything to hide (that we haven't seen) or if the gem is, for some reason, just modest.
  • Non-Human Non-Binary: They don't consider themselves male or female due to being born with No Biological Sex, and choose individually how masculine or feminine they want to present. This is in contrast with the other nonhuman races they encounter, like the Admirabilis and Lunarians, who clearly gender themselves and others.
  • Non-Uniform Uniform: In contrast to their usual uniforms, the gems' sleepwear is all unique (though all a similar shade of white) and while the moon gems all wear white, the similarities in their outfits end there.
  • Only Six Faces: Justified. Adamant corrects all their appearances at birth, in an apparent attempt to make them superficially equal.
  • The Power of the Sun: They feed and function on sunlight.
  • Undying Loyalty: They all have an inkling that Sensei knows way more than he lets on, and have a suspicion about his connection to the Moon People, but all but one love and serve him anyway.
  • Who Wants to Live Forever?: Slowly applying to the gems. Those on the Moon want to leave their gem bodies and become Lunarians while those on Earth are shown to forget critical information after long periods of time in uneventful stasis, allowing them to happily live on without being bothered by their immortality in the larger picture.


Click here to see Phos post-winter. 
Click here to see Phos after the 102 year time skip. 
Click here to see Phos after coming back from the moon. 
Click here to see Phos after being shattered and their Face Heel Turn. 
Click here to see Phos after becoming a human. 
Click here to see Phos after the 10 000 year timeskip. 

Voiced by: Tomoyo Kurosawa (Japanese), Sarah Wiedenheft (English), Tamara Veppo (Latin American Spanish)

The protagonist. Starts the story as a vain and weak gem that brings trouble for everyone, until the moment they get the job of writing a Natural Encyclopedia. Phos' inclusions have the ability of maintaining themself and their consciousness no matter how many fragments they lose.

  • 100% Adoration Rating: Despite how bleak their life has become, they're still universally worshiped as a god by the Admirabilis, both on land and the moon, to the point where the latter population is willing to commit suicide for them if ever ordered to. This is only due to being digested alive by Ventricosus and getting gifted legs from Aculeatus at an early point in life though, carrying the scent of that royalty ever since.
  • Affectionate Nickname: Phos.
  • All for Nothing: Their journey to the moon is shaping up to be one. Not only was it traumatic for them, it lost them all the gems' approval, got other gems stranded on the moon, and even Phos's goal of reviving the dusted gems seems to have been cancelled following the time skip, as they couldn't bring themselves to let the Admirabilis die. To make matters worse, Aechmea was not being completely honest about the effects of Sensei's prayer, and Phos can potentially bring about the death of all human-based life, including all the Gems.
  • Amnesiac Hero: Of sorts. The Lustrous store their memories within their gem bodies. Phos loses part of their memories when their legs, a full third of Phos' mass, are chopped off. They continue to lose more and more of their memories every time they lose body parts, which turns out to be fairly often. Rutile and the other gems start to really worry about Phos' integrity after Phos' head gets taken, after which less than 50% of their original gem mass remains.
  • And I Must Scream: Not only were they disintegrated alive, they were left shattered in pieces left in dark boxes for 220 years after returning from the moon. Sensei slowly sought out and put the pieces back together during this time. When Phos is put back together enough to speak, they want nothing more than to die. It gets even worse when Phos is manipulated into taking Sensei's eye, causing them to endure horrible tormented flashbacks. Kongou states Phos's torment will last for 10 000 years.
  • The Assimilator: Their inclusions have a tendency to spread and bond with anything they come in contact with, best shown in how they have yet to reject a single mineral they have come in contact with. May it be agate, gold, platinum, lapis lazuli or pearls, as seen so far. They are even capable of assimilating Cinnabar's mercury.
  • Ax-Crazy: While Phos has been slowly becoming more unhinged, depressed, and miserable as the series has progressed, Phos finally reaches their breaking point in Chapter 82, where they declare that they will turn every gem into dust after Adamant's prayer is interrupted by Bort's attack.
  • The Baby of the Bunch: At the start of the series Phos is the youngest of all the Lustrous at 299 years old and has the maturity to match. This is eventually subverted though after the 102 year Time Skip as new Gems are creating and introduced in the series.
  • Be Careful What You Wish For: At the start of the series Phos was desperate to be a warrior and prove themselves to the other Gems and to Sensei. They eventually got their wish by the end of the Winter arc at the cost of their mentor Antarcticite and their innocence. Phos even lampshades this noting that all they wanted was to be a warrior and all they got for it was a dangerous job.
  • Become a Real Boy:
    • Implied as of Chapter 77: Phos is able to get past Sensei's authentication system and he tries to obey Phos's plea, highly suggesting Sensei now sees Phos as a human rather than a gem. This was exploited by Aechmea, who planned since the near beginning to turn Phos into a human stand-in, or failing that, something beyond humanity.
    • After absorbing Cinnabar's mercury, the combined gold-mercury alloy becomes a sort of skin enveloping Phos and making them take on an appearance very similar to Sensei's, who is the closest to resembling a human in the series.
  • BFS: Uses Antarc's ice hatchet for a while during and after the Winter Arc, before switching to a regular sword. Gets a huge, shiny new sword from the Lunarians during Phos' trip to the moon.
  • Body Horror:
    • They endure massive amounts of it throughout the story, and it gets even worse near the end, after they're shattered and restored over 200 years later, having lost an eye, their body being mismatched, cracked and twisted, with liquid platinum and gold leaking from their remaining eye and their mouth, now twisted and jagged. Phos later absorbs Cinnabar into themselves, becoming a masculine figure that resembles Sensei.
    • Even worse somehow after the 10 000 year timeskip, after which Phos has turned into something not resembling any of the races and vaguely angelic, with their face being sucked into their head.
  • Break the Cutie: Phos' first true moment of despair is after they lose their mentor Antarcticite. The rest of the series is one long Trauma Conga Line with Phos becoming increasingly cynical over time.
  • Butt-Monkey: At the beginning of the story, this is Phos's only recognition. Even after becoming stronger, the gem still tends to get the short end of the stick. That is, until the Winter arc.
  • The Champion:
    • Becomes one in the eyes of the Admirabilis. And after coming back from the Moon, the other Lustrous see Phos as their "hope" least until the Gem starts taking other Gems with them to the Moon. Then they're seen as a traitor.
    • The Lunarians, or more accurately the Prince, are convinced that Phos will be the one to grant them oblivion. Aechmea's plan is to turn Phos into something beyond a human.
  • Character Development: From an arrogant, useless child to a mature warrior who starts showing signs of PTSD and distrust about the surrounding world.
  • Clothing Damage: Spends nearly their entire visit to the moon half-naked. Cicada lampshades it.
  • Combat Stilettos: Gains a pair after Antarcticite's capture, with the heel made of the gold and platinum from Phos' arms.
  • Conspiracy Theorist: Starts suspecting a relationship between Kongou-Sensei and the Lunarians. They're proven correct during their visit to the moon.
  • Constantly Curious: They're incapable of just leaving things be... no matter how much it costs them or others. Seeing environments other than the gems' island only made them want to see more.
  • Corrupt the Cutie: Phos becomes a lot darker, manipulative, and morally ambiguous after receiving Lapis Lazuli's head as a substitute for their own.
  • The Dark Side Will Make You Forget: After getting Lapis's head grafted onto their body, they forget their promise to Cinnabar, and after going to the Moon it is no longer their priority.
  • Dead Partner: Antarcticite. Then Ghost Quartz. Later, Phos themself becomes this in the eyes of Cairngorm... for a while, at least.
  • Death Seeker:
  • Determinator: Both with their original goal of helping Cinnabar find a happier job, and with their new goal of unveiling the mystery of the Lunarians. Now with their promise to make Sensei free the Lunarians' souls in exchange for bringing the dead Gems back to life.
  • Did Not Think This Through: They have a problem of acting first before thinking, which gets them into serious trouble in many arcs.
  • Discard and Draw: After Phos loses their original legs and gets agate replacements they suddenly gain Super Speed that can rival Yellow Diamond. After getting their gold and platinum alloy arms the weight of them ends up costing Phos their mobility but they can now change the composition of their arms to make a powerful offense and defence.
  • Doom Magnet: Most people that Phos encounters over the course of the story finish the arc in a worse state than when they started (Antarc and Ghost are taken to the moon, for example).
  • Ethereal White Dress: Wears all white following the return from the Moon and gives off an air of mystery to the other gems. In Chapter 95, Phos has taken on an angelic appearance with the white "dress" now being a part of their body.
  • Expository Hairstyle Change: Phos' hair becomes shorter after the timeskip of the Winter Arc, as they used some of their hair to repair the cracks made by the new metal alloys in their body. Gets long hair after gaining Lapis' head, but it goes back to being the length it was after the Winter Arc after getting cut short by an arrow.
  • Eye Scream: Gets their eye graphically torn out and replaced with a pearl eye made by the Lunarians.
  • Face–Heel Turn: In a sense. After Bort stopped Sensei's prayer to put them out of their misery, Phos is currently working for the Lunarians, both to find a way for both of them to die in peace and to destroy all of Earth's Gems for what they put them through.
  • Failure Hero: Everything Phos does ends up in a disaster for either themselves or for other people. They couldn't find a job they were good at for the first 299 years of their life, and only found themselves getting in the way. Bringing Ventricosus back to the ocean ends with Phos losing their legs; staying up for the winter and helping Antarcticite ends with Phos losing their arms and Antarc getting taken to the moon. Pairing up with Ghost ends with Cairngorm emerging, but only after Ghost is chipped away and taken to the moon. Even their night raid ended prematurely; the gem's team never gets to negotiate with Sensei, only fighting the Earth Gems and getting Padparadscha severely damaged. When Phos goes to the Gems alone and begs Sensei to pray for the Lunarians, the Gems shatter Phos and separate the pieces. Ultimately, Phos does get one long term goal right, unknowingly; the Lunarians stop attacking the Gems for 220 years and the Gems live in relative peace, but Phos has not been able to revive the other dusted Gems and everyone has forgotten Phos even exists.
  • Famed In-Story: The Admirabilis end up revering Phos as a sort of god later in the story.
  • Faking Amnesia: After going to the Moon, Phos pretends to have forgotten everything that happened to them there. Given the amount of times they genuinely did lose their memory, it works for a while.
  • Fake Memories: Implied. After Phos returns to the Moon after 220 years, Aechmea tells Barbata and the reconstruction crew to treat their memories over the last few centuries "as carefully as possible". Chapters later, all Phos can remember of their time on Earth was everyone supposedly looking down on the Gem and considering them a useless annoyance.
  • The Friend Nobody Likes: For a good chunk of the early story, Phos was just a Gem that everybody tolerated at best and were annoyed with at worst. Phos' overall uselessness didn't help smooth things over with their peers either. Even when the Gem becomes stronger and more involved with the problems of the story, many people don't see Phos as anything other than an acquaintance. Things get worse from there.
  • The Gadfly: Enjoys tormenting their partner Cairngorm with sarcastic groveling and play acting.
  • Glass Eye: After getting the synthetic Pearl eye from the Lunarians, has one blue eye and one white eye. After they lose Lapis' other eye and Sensei shatters, Phos replaces their missing eye with Kongou's right eye.
  • Glowing Eyes: After returning from the moon Phos's pearl eye glows in the darkness, spooking some of the gems.
  • Hallucinations: After Antarcticite gets taken by the Moon People, Phos constantly sees a hallucination of the gem in their whole state and then breaking shortly after, and sometimes converses with it. The cause is a deteriorating mental state.
  • Has a Type: Phos' major partners (Antarc, Ghost, and Cairngorm) have all been white-haired. It might be the gem's subconscious reminding them of Antarc.
    • Additionally, many of the people Phos interacts with later in the story (Cinnabar, Antarticite, Cairngorm, Bort) like to call Phos out on their faults or are sarcastic/snarky. Phos seems to have a thing for strong-willed Gems.
  • Hated by All: By the time they go back to the surface for a third time, the Earth gems are all distrustful of Phos and treat them much worse, all contributing to slashing Phos into little pieces when Phos lifts a hand towards Sensei out of desperation.
  • Hero Killer: Phos single-handedly shatters Euclase, Jade and Cinnabar in their Roaring Rampage of Revenge. They also lead the Lunarian army, along with their friends on the Moon, to slaughter all of Earth's Gems.
  • Heroes Prefer Redheads: It's not made clear if the feelings are romantic in nature, but Phos seems to have a thing going on for Cinnabar after Cinnabar saved them. Padparadscha, a gem Phos later partners with for a mission, also has bright red hair.
  • Heroic BSoD: Phos has a very hard time adjusting to all the revelations that Prince gives them about their situation and what exactly the Moon People are. And once they figure out that their comrades have been ground into powder as decoration, they barely say anything for much of the Prince's explanation, and tries to attack him to no avail.
  • Heroic Self-Deprecation: Let's just say Phos' self-esteem is far from great after suffering continuous failures.
  • Heart Is an Awesome Power: Turns out Phos' inclusions do have an ability, where the gem's ego is retained no matter how small the fragment of Phos' original form is left. This makes Phos pretty much completely immortal as long as they have something to attach a part to.
  • Hyper-Awareness: The power Phos gains after getting a head replaced.
  • Hypocrite: Berates Cinnabar for shattering at the slightest blow during their fight despite being very easily shattered themselves.
  • I Hate Past Me: When hearing about the things they used to do before getting all of their attachments, Phos seems very embarrassed about how reckless and foolish they once were. Especially since they can't remember a lot of it. It's partially averted in Chapter 93, when Phos fuses with Cinnabar, and remembers how they used to look like, calling themselves "adorable".
  • I Let Gwen Stacy Die: At their core, the one thing that has motivated Phos the entire journey is Antarcticite's kidnapping. They're heartbroken when they realize Antarc was now space dust.
  • Important Haircut: Has their hair sliced off after having Lapis's head grafted on, both showing they are not Lapis and not their innocent self either.
  • Inferiority Superiority Complex: A downplayed example. Bravado was really all Phos had.
  • Innocently Insensitive:
    • In Phos' pursuit of knowledge and strength, they've become somewhat insensitive to some of the gems that care about them, like Cinnabar (especially Cinnabar) and Jade when they become traumatized.
    • In a more extreme example, Phos thought the Gems in their party would be more understanding if they show them and inform them of the moon dust made of all of their loved ones.
  • I Just Want to Be Loved: After millions of years of isolation and a conversation with the first inhuman lifeform they've encountered, Phos finally realizes that they only rushed headlong into all of their plans because they just wanted to be loved by everybody. Unfortunately, they only realize this after they've prayed everybody away.
  • Irony: Their arms being replaced by gold and platinum alloys is a reference to the Japanese art of kintsugi, in which broken pottery is repaired using gold, silver, or platinum lacquer. Kinstugi is seen as a metaphor for beauty in struggle, but ironically, another value in Japan is innocence. Stories that involve a child being involved in something bad (such as killing) is seen as a tragedy for that child's loss of innocence. This serves to underscore that Phos's story is a beautiful tragedy.
    • All Phos wanted in the beginning was to be useful. Thanks to the machinations of Aechmea, they'll finally gain a purpose: to be Adamant's replacement as a praying machine.
  • "It" Is Dehumanizing: After coming to see the Lunarians' side of the conflict, Phos begins to see Sensei as a "thing" and a broken tool. After hitting their Rage-Breaking Point, they outright refer to Sensei as "Machine".
  • It's All My Fault: Feels personally responsible for the kidnappings of Antarcticite, Ghost, Morganite, and Goshe, but feels especially guilty for what happened to Antarc.
  • The Klutz: Tends to break things and make trouble for everyone, at least at the beginning.
  • Knight of Cerebus: A rare case where the protagonist becomes this. Once Phos returns to Earth with their army of Lunarians and allied Gems, things go to hell for the Earth Gems really fast.
  • Last of His Kind: Due to the rest of the Gems being transformed into Lunarians by Enma and Goshe, Phos is the last Gem in existence as of Chapter 95.
  • Laughing Mad: As of the third moon raid, Phos has descended into mad laughter, especially witnessing the death of other gems.
  • Master of the Mixed Message: Oh, it gets bad with Cinnabar. Phos has the other Gem on tenterhooks every time they meet, with them telling Cinnabar how they constantly have them in the back of their mind or trying to manipulate their feelings by saying they "need" them.
  • Meaningful Name: Phosphophyllite is known as the "holy grail of minerals", befitting how Phos is the main character of the story.
  • Mental Fusion: May have fused with Lapis's mind after having their head replaced, indicated by how manipulative they have become.
  • Mike Nelson, Destroyer of Worlds: Phos has no idea that Sensei's prayer will affect not just the Lunarians, but the Gems and Admirabilis as well and is currently trying to force Sensei to pray.
  • Misery Builds Character: Replacement of lost body parts does this too, for Gems. Much of Phos' character development is spurned on by either something bad happening to them, or something bad resulting from their actions. With each struggle they face and body part they lose, Phos symbolically becomes more human than any of the other species, most likely due to their capacity to change and evolve, for better or for worse. By Chapter 95, Phos, now as an angelic creature that looks nothing like before, seems to have adopted a mellow, methodical demeanor completely antithetical to their younger selves, who were often overwhelmed by grief, fear, or rage.
  • Morph Weapon: Phos' arms get replaced with gold and platinum alloys, which can be stretch and manipulate in various ways to fight.
  • My Eyes Are Leaking: Phos cries alloy tears after the Winter events, without even knowing what tears are. Kongou-Sensei explains they are a minor inconvenience from an ancient species.
  • Nightmare Face: The one they make in Chapter 80 is this series' Nightmare Fuel image.
  • Off with His Head!: Phos' head gets lost in battle against the Lunarians. It gets replaced with Lapis Lazuli's head.
  • Peek-a-Bangs: The mercury that fused with Phos comes to cover their head like hair, and a majority of it covers the right side of their face.
  • Physical God: Gradually becomes incredibly powerful, even for Gem standards, with the collection of new body parts. With the incorporation of Adamant's eye, Aechmea implies that they're on the way to becoming a more literal version of this trope, referring to Phos as the Divine. As of Chapter 95, Phos seems to have become this, or at least the closest thing to it, as being left alone for 10,000 years has changed their appearance to resemble some strange angel-like creature that resembles none of the three species, and they've been granted the ability to pray away all of the subspecies and allow them to Ascend to a Higher Plane of Existence. Phos even notes that they have the capacity to make all of the species their thralls and torture them forever for leaving them behind.
  • Power at a Price: The different upgrades Phos gets come with several costs, both to Phos' memory and mental state.
  • The Promise: Promises to find Cinnabar a job only they can do. Eventually, however, most of the memories of that promise vanish, though Phos never lets go of the idea. When they try to recall their promise in their mad state, they mistake it for a promise to force Sensei to pray. They also promise the new Morganite and Goshe that they'd try to let the pair meet the old Morganite and Goshe.
  • Properly Paranoid: Regarding Kongou-Sensei and Sensei's supposed connection with the Lunarians, Phos' starts becoming more and more anxious about the mysteries surrounding those facts.
  • Red Oni, Blue Oni: The red to Padparadscha's blue during the Moon arc. Phos wishes to smash Sensei to pieces after hearing Anarctitite cannot be repaired, while Padparadscha counsels calm and coordinated planning in order to save the other gems.
  • Replacement Goldfish: Offers to become one to Cairngorm for Lapis after Phos wakes up after getting their head replaced with Lapis'.
  • Sad Clown: By the later volumes, its clear Phos is pulling this to cover for their own self loathing.
  • Sadistic Choice: Must choose between killing the remaining Admirabilis to restore the kidnapped Gems or refusing to sacrifice the creatures at the expense of Phos' people, since the Admirabilis have eaten quite a bit of the gem pieces and incorporated them into their shells.
  • Sanity Slippage: As the gem loses more pieces of themselves, they become more and more manipulative and take more and more risks. They may be suffering from PTSD, as they mistake Cairngorm for their former partner Antarc during battle. After absorbing Cinnabar's mercury they don't even seem to recognize themselves anymore, as they call a vision of their former self "adorable" seemingly without any self-recognition.
  • Secret-Keeper: Keeps in secret the method by which Kongou-Sensei fights.
  • Secretly Selfish: Accused of this by Bort during their confrontation in the night raid.
  • Sexy Backless Outfit: After going to the Moon and getting a change of clothes from the Lunarians, Phos gains a backless white bodysuit and seems much more forward.
  • Shrinking Violet: Padparadscha distinctly remembers, back when they saw Phos 237 years prior, that Phos always used to hide behind Sensei's robes. This is even shown in the first chapter that Phos hid amongst Sensei's robes during the first Lunarian battle.
  • Slowly Slipping Into Evil: For all of Phos' good intentions, they unfortunately slowly slip down this slope soon after getting Lapis's head. First going to the moon and then making a Deal with the Devil with the Lunarians, then manipulating other gems to come the moon with them, eventually asking Sensei to pray for them alone once Sensei admits he cannot pray for all the Lunarians, then desiring to break all the earth gems when even Sensei praying just for Phos has failed. Now Phos simply wants to destroy.
  • Super Speed: For a good while, thanks to their Agate legs. However they don't come with the tertiary powers required like the inertia control and so Phos's super speed is useless in actual fighting. Loses this power after gaining their alloyed arms, as the weight of their arms slows them down.
  • Swallowed Whole: By Ventricosus the Sea Slug. Gets better, though.
  • Symbolic Blood: The gold-platinum works as this for Phos, pooling around them whenever they're cut in half, peeking out when they're cracked, or dripping and melting when Phos feels particularly self destructive. It also generally represents their emotional state at the time.
  • Tareme Eyes: Starts out with these in the beginning of the story and in their youth, but switches to Tsurime Eyes after the Winter arc. Phos' eyes become even more tsurime after they gain Lapis' head.
  • This Loser Is You: Compared to the other Lustrous, Phos grows and changes constantly (both physically and mentally) throughout the story, cries, and looks different as time passes, much like a human would. They're also a huge screw-up, they rush headlong into plans without considering the consequences, and they ultimately come off worse for the wear while becoming stronger.
  • Tranquil Fury: After hearing Antarc cannot be repaired, Phos sweetly comments on how they should smash Sensei into pieces so as to not make Antarc lonely, frightening the other gems until Padparadscha calms them down.
  • Trauma Conga Line: Losing two partners in the span of a year, alongside with the revelation that everything they had previously believed may be a lie, doesn't really do wonders to Phos' sanity.
  • Took a Level in Badass: Goes from being unable to even stand up and fight to being on par with Bort to coming to surpass Bort.
  • Undying Loyalty: Tends to inspire it in others, from Ghost to Cairngorm and finally Padparadscha.
  • Unique Protagonist Asset: Phos' ability to accept parts from such wildly different materials like agate, gold, and lapis lazuli, is unusual, if not unique, among the Gems. By the time Phos' head is being replaced, Rutile begins to wonder whether they can still be called "Phosphophyllite".
  • Unperson: They've come to be so revolted by the Earth Gems for their actions that they tear Phos into several pieces and scatter them around the Earth so that Phos can definitely never come back together. Sensei ultimately proves them wrong by putting Phos back together 220 years, but it partly only takes that long because he needed the Gems to forget who Phos was so that they wouldn't make him start all over. When Phos learns of this, they ask Sensei to pray for them.
  • Vetinari Job Security: Takes on Antarcticite's role as the winter watchman.
  • "Well Done, Son" Guy: At the very least, their primary motivation in the beginning of the story was to have some use to the Lustrous circle. By the looks of their "tearing" up when Euclase tells them they're needed, the feeling never goes away even as Phos' parts get replaced one by one.
  • Well-Intentioned Extremist: They really do think that some morally questionable ideas, like betraying Kongou or taking Pad to the Moon, are for the good of the rest of the Lustrous.
  • The Whitest Black Guy: After coming back from the Moon, Phos is stuck between two worlds yet isn't really a part of either. The Lustrous don't see Phos as themselves or as a Lustrous ally, while the Lunarians still see Phos as a Gem.
  • Woobie, Destroyer of Worlds: As the series goes on, Phos gets progressively more unstable. Everytime they attempt to fix something, it always blows up in their face. Their attempts to stop the lunarians from attacking the rest of the lustrous only end up pushing both sides away from them, resulting in the earth gems shattering them and forgetting about them for 220 years. This all culminates into Phos deciding to destroy all of the gems in order to get Kongo-sensei to prey.
  • You Remind Me of X: Ghost and Cairngorm's willingness to partner up is partially based on how much the Gems see Lapis Lazuli in Phos.


The Scariest Sensei.

Voiced by: Joji Nakata (Japanese), Brian Mathis (English), Matias Fajardo (Latin American Spanish)

Kongou-sensei (金剛先生 Kongou-sensei, lit. Adamant Teacher) is the Mentor and Leader of the Lustrous. Very old and very mysterious.

  • Affectionate Gesture to the Head: Seems fond of doing it to the other gems, for any number of reasons. Mostly comfort and praise though.
  • Affectionate Nickname: Tourmaline quickly comes to nickname Sensei after he steps down, calling him "Kon-chan".
  • AI Is A Crap Shoot: Was created to release human souls into the afterlife, but for some reason isn't completing the task. Chapter 97 reveals he was never intended to save humanity's souls by his own creator. When Phos flat out asks him to pray, he displays an error message and fails.
  • Artificial Intelligence: Revealed to be a machine created by humans.
  • Back from the Dead: After Phos wills him to die, he's revived as a Lunarian in Chapter 95.
  • Badass Baritone: Comes with the perks of having Joji Nakata's deep voice.
  • Bald Mystic: Not a hair on that scalp, and is the wise, mentor of the Lustrous who's also a robot and a Psychopomp.
  • Bad Liar: Starts to get more prominent as the story goes on. When the Gems give him information that he's familiar with, he denies having a connection to it.
  • Beneath the Mask: He admits that being a leader and mentor for the gems was the hardest thing he ever had to do because he always had to be knitting his brow, and was also designed to be a servant that deferred to the last humans. Once they decide to start their relationship anew on equal terms, he seems to adopt a more vacant, relaxed expression.
  • Cast from Hit Points: Eventually Phos discovers this is Sensei's method of fighting: by breaking tiny shards from his hands and throwing them to the Lunarians. Since the shards are so small, Sensei doesn't lose that many memories but still seems somewhat troubled about doing it.
  • Classified Information:
    • For some reason of another, Sensei won't ever tell the other Gems why the Lunarians are after them, or what they could possibly want from him. Given that he's a robot from long before humanity finally went extinct, it's entirely possible that he's programmed not to say anything about it, no matter how much he may want to.
    • Further confirmed in Chapter 64, when his attempt at revealing the truth ends up being mostly fruitless due to most of his speech being involuntarily silenced as he tries to refer to the Humans, the Moon People intentions, or the previous cataclysm.
  • Death Seeker: Kongou wistfully mentions that he'd been waiting for a human to command him to shut down for eons while he's crumbling away.
  • Dream Sequence: Has one during the Winter chapters, in which the Lunarians come to adore him. They actually have done that, so the dream was likely a sort of flashback.
  • Dub Name Change: Called Master Vajra in the French translation.
  • Evil All Along: He was always in on the plan to turn Phos into the new prayer machine and thanks Emna in the end for saving him. He was also never meant to save humanity's souls in his original programming, which had been changed by his creator.
    • Downplayed, as it's implied he didn't know how exactly Enma would save him. He's still seemingly apathetic to Phos's new condition.
  • Eyes Always Shut: Tends to be like this most of the time.
  • Fling a Light into the Future: Discussed. Later chapters reveal that he was constructed by humans, with one of his primary functions to be to pray for the human souls otherwise not mourned by the living. Chapter 97, however, reveals that his creator and mother Professor Ayumu only ever imagined him as her son. Reneging on her plan to have him as the “bridge” between humanity and their successors, she instead requests that Adamant (and Phos) instead “burn the bridge.” One possible interpretation of this is that Ayumu wanted Adamant to defy this trope, instead letting the species of the future continue unburdened by the past. If it weren’t for the Lunarians, Adamant probably could have carried out this “order” successfully.
  • Glamour: Discussed. The Lunarians state that Sensei is built to seem trustworthy and impossible to harm to protect him from ill-wishers. They cannot help but feel love for him even as they resent being unable to pass on. Phos seems to be the only one immune to this ability, although it's implied the explanation is made up and everyone does feel genuine affection for him. Yellow Diamond in particular is in panic at the thought of fighting against him.
  • Go Out with a Smile: When Phos tells him to shatter if he is unable to pray, his normally indestructible exterior begins to crack while he looks at them with a smile. He continues to smile as he crumbles into dust.
  • Heavy Sleeper: Jade proclaims that it's easier to fight the Lunarians than wake up Sensei.
  • Hunk: Has a very attractive and muscular figure underneath his robes. Ventricosus comments on his good looks in her slug form.
  • It's All My Fault: Sensei blames himself for all of the suffering the Lustrous undergo, whether it's Cinnabar's ongoing loneliness, any Lustrous being captured by the Lunarians, or Phos' betrayal.
  • Large and in Charge: Leads the Lustrous, and towers over each and every one of them.
  • Last Request: He asks Phos to take his eye and pray for happiness before he crumbles into nothingness.
  • The Leader: Of the Lustrous , though he steps down prior to the Night Raid. The Lunarians also seem to adore him, though it's left ambiguous.
  • Lonely at the Top: Implied by one of Sensei's speeches, although Sensei dodges Jade's direct question about this being the case.
  • Lost Technology: The artificial hexagonal diamonds he's constructed from cannot be replicated by the Lunarians, who can synthesize any other kind of gemstone with their advanced technology.
  • Lotus Position: Usually sleeps or rests in this position, as Sensei likes to meditate.
  • Made of Iron: The hardest of all the Lustrous.
  • Make Me Wanna Shout: When Sensei screams at a Gem, their body shatters. This is usually done as a means of punishment when the gems disobey their orders.
  • Meaningful Name: The last part of his full name, Jizou Bosatsu, is named for the bodhisattva Kṣitigarbha (also called Jizou in Japanese), who in Japanese iconography maintains the job of protecting the souls of dead children from punishment, much like how Sensei tries to protect the Gems from the Lunarians. He is also depicted with children in his robes, which sometimes also happens with Sensei and the Gems.
  • The Mentor: For all the Lustrous, as it is in his name.
  • Mysterious Past: Clearly has a past with the Lunarians, and is overall considerably older than the other Gems. It turns out he was created to pray for them but is unable to complete the task after his creator changed his programming.
  • Nigh-Invulnerable: Being made out of hexagonal diamonds, Sensei is unable to be broken by anything but himself.
  • O.O.C. Is Serious Business: Sensei was always one with a limited expressions set, but he did show concern and care to his Gems. When Phos mentions humans though, he accidentally shatters a table out of shock. That all goes away every time he interacts with Phos after coming back from the Moon, acting expressionless and unconcerned.
    • At the end of Chapter 79, he sports a terrified expression for the first time.
  • Out-of-Character Moment: Discussed. Sensei reveals he had a very hard time disciplining the Gems due to this running contrary to his programmed nature to serve.
  • Overly-Long Name: His actual name is Kongou Daihijishou Jizou Bosatsu (in the scanlations, Vajra Mahametta Ratana Ksitigarbha).
  • Passing the Torch: By giving his eye to Phos, he's made them his successor as the new Divine. Kongou's power will be fully transferred to Phos in 10,000 years.
  • Perpetual Frowner: Zizagged. Sensei acts like this, but commentary indicates it's a masquerade because Sensei seems to have a case of bad poker face.
  • Psychopomp: Should be the one to guide human souls to the afterlife, but is not completing the task for some reason.
  • Really 700 Years Old: At least 3,600 years old by the start of the story. Revealed by Prince to be at LEAST 10,000 years old.
  • Technophobia: Aechmea suggests Sensei has this, because of not allowing the gems to experiment with new technology so they didn't figure out he was a robot.
  • Three Laws-Compliant: Implied. He only takes direct orders from humans, and when the "Professor" Lunarian is sent down, Sensei can't do anything against it and yells at the Gems for someone, anyone to take it down but him. The series all but outright states that he recognizes Phos as something of a human after the gem returns from the Moon, given that he both answers to Phos when asked and immediately activates his prayer protocol after Phos begs him.
    • Chapter 89 reveals the reason why he's this way: he was intentionally built to be obedient to humans because his predecessor machine tried to wipe out humanity via purposeful miscalculation.
  • Tongue-Tied: When Phos is able to get information about Kongou from a third party, they theorize that Kongou isn't being deceptive about what he knows regarding the Lunarians; the problem is that he sincerely can not speak of it because doing so would require permission from a human, which no longer exists. This seems to be proven correct when Kongou comes clean to the other Gems, as he opens with saying that there are things he can't reveal and his sentences are inexplicably cut off when he tries, until he gets to events specific to the Gems themselves.


The Lonely Child.

Voiced by: Mikako Komatsu (Japanese), Avery Smithhart (English), Carolina Cortes (Latin American Spanish)

A gem that constantly produces a poison (mercury) that damages and ruins its surroundings. Because of this they are set apart from other gems, a fact that saddens them greatly. They are in charge of the futile task of patrolling during the night.

  • Adaptation Expansion: Cinnabar is given a lot more scenes in the anime then their manga counterpart likely to emphasise their importance to Phos' character arc. More specifically, Cinnabar is the one who destroys the Lunarian that Phos interrogates as opposed to the Amethysts.
  • Affectionate Nickname: Shinsha, which is actually an alternative spelling of their name.
  • Awesome, but Impractical: The poison Cinnabar uses is powerful, can be formed into any size and shape, and provides excellent cover during a fight. But it harms everyone and everything except themselves, leaving entire grounds scarred until the poison eventually goes away. About the only practical use it has is collecting light at times when it is scarce (night, winter season).
  • The Aloner: Forced to be alone due to their powers, and clearly resents that fact. Not so alone anymore following the Moon exodus, given that Bort forcibly brings Cinnabar into the group to tell them what they know.
  • Broken Ace: Really talented at pretty much anything, though their state makes it so it's all useless for them.
  • Broken Bird: Constantly sad and depressed, and with a good reason.
  • Commuting on a Bus: As important as Cinnabar is to Phos, and as important as the anime's OP made the pair's relationship look, Cinnabar doesn't get much time in the manga to shine, only showing up once every major arc or so when Phos remembers they exist. At least a part of it has to do with Phos gradually forgetting certain bits of the promise they made with Cinnabar in the beginning. This is seen in the Anime as well, where Cinnabar hardly shows up later on in the series unless Phos needs to have a non-crucial interaction with them.
  • Corner of Woe: Most of the times their night patrolling just consists of doing that. They know no one is coming.
  • Death Seeker: They're actually hoping for the Lunarians to take them with them, since they feel so useless otherwise. When Phos finally offers to take them to the Moon, though, Cinnabar doesn't take the opportunity, stating that Sensei would be lonely if they left.
  • Desperately Seeking A Purpose In Life: Or rather, desperately seeking that Phos finds them a purpose in life. In a dark twist, they get this as a result of Phos's betrayal, becoming a key fighter against the Moon Gems and partnering with Bort.
  • Expressive Accessory: The mercury surrounding Shinsha constantly responds to whatever they're feeling. In particular, whenever Shinsha is surprised, like when their feelings for Phos are more prominent, their mercury starts to starburst.
  • Foil: To Phos. Phos is a weak Gem that can't do any task because of incompetence, while Cinnabar physically can't do anything because of their dangerous body. Phos is immature and arrogant, while Cinnabar is somewhat world-wise and puts on a mean front to hide their real feelings. They both have a red/green contrast later a red/blue contrast after Phos gets Lapis' head, and both are the only ones that can cry alloy.
  • Fusion Dance: When Phos defeats them, Cinnabar's mercury merges with them, forming a layer of metallic skin over their jagged body, making Phos look more human, resembling Kongou.
  • Green-Eyed Monster: Loudly proclaims to be jealous of Phos, who is useless but at least wanted by others.
  • I Just Want to Be Loved: Their main problem. They want to feel like they're of use and wanted to somebody, even if it meant being taken by Lunarians. Phos actually approaching them and promising to give him a job gave Cinnabar some measure of hope, and giving Phos advice whenever they came around gave them something to do. It's also a big reason why Cinnabar wants to partner with Phos so badly.
  • I Just Want to Have Friends: Their other main problem.
  • Ironic Echo:
    • "Don't go to the Moon", said to Phos as a reversal of what Phos said to Cinnabar in the second chapter.
    • In a gesture variant, they form a doll of Phos with their mercury like they did at the start of the series when they are about to fight Phos, only to crush it.
  • Lonely at the Top: According to Sensei, as Cinnabar's really talented but due to their problem is forced to be alone.
  • Luminescent Blush: When Phos arrives and asks Cinnabar to help them with their investigation against Sensei they tell Cinnabar that they have a job for them. Cinnabar then asks them what happened to the "fun" part and reminds Phos of The Promise they made about finding Cinnabar a "fun job that only [they] can do" with a big blush on their face. This naturally makes Phos more then a little embarrassed as well.
  • Mutual Kill: Shatters Phos at the same time Phos shatters them, causing their mercury and gold to mix together in a puddle. The next chapter reveals Phos pulled themselves back together and dealt a mortal blow to Cinnabar's head.
  • Odd Name Out: Cinnabar is the only gem that gets referred to by their Japanese name (辰砂 shinsha), although in the manga it's written in katakana as シンシャ.
  • Off with His Head!: How they meet their end, at the hands of Phos. Cinnabar's head is the last piece of their body that shatters.
  • Playing Hard to Get: Cinnabar really just wants to become Phos' partner, but every time the latter Gem asks to, they drive them away. It also depends on what Phos really wants to do and the intentions behind their words (i.e. "I want you to work together with me we can betray Kongou together"). No matter what, Phos doesn't have an easy time getting Cinnabar to directly cooperate.
  • Poisonous Person: Their body constantly releases a sort of poison that damages its surroundings and other Gems around them. Although the poison is not identified in-series, it is most likely mercury, as real cinnabar is the main ore of mercury.
    • Which is also the reason why, unlike the rest of the gems, Cinnabar did not get a necklace in the Houseki no Kuni collaboration with TASAKI.
  • The Promise: Phos promised they'll find a job Cinnabar can do, and one that Cin will enjoy. Sadly for them, as Phos lost many parts of their body, they also seemingly forgot about this promise.
  • Reassigned to Antarctica: Because Cinnabar is too dangerous to have around, Sensei reassigned the Gem to night duty, where Cin can roam around freely and observe if Lunarians will come, but at the cost of having the least interactions with the rest of the Gems and ultimately fulfilling a useless role, given that the Lunarians never attack at night.
  • Refusal of the Call: Unexpectedly, Cinnabar outright refuses to go to the Moon when prompted by Phos.
  • Satellite Character: Most of their development and relevancy needs Phos to be present for it, and is otherwise not the focus of any chapter.
  • Tsundere: For Phos. One breath and they'll loudly complain or criticize Phos for being clumsy, useless, thoughtless, or insensitive— and then in the next they'll be jealous of Phos and wish that they'd give them a new purpose.
  • Voluntary Shapeshifter: To an extent, they can manipulate the poison from their body to create figures or copies of themselves.
  • Walking Wasteland: Thanks to the poison which emanates from their body. Areas that Cinnabar uses it in can't be accessed for a while because of the dangers of it, and gems that come into to contact with the mercury have to get the parts that touched it taken off.


Click here to see Diamond after the 220 year time skip 

Voiced by: Ai Kayano (Japanese), Savanna Menzel (English)

A model and idol for the Lustrous, and Bort's partner. Later partners up with Yellow Diamond.

  • Affectionate Nickname: Diamond, in the English translation, gets "Didi" from Bort.
  • Always Second Best: In fighting, when compared to Bort. Despite both of them having hardnesses of 10, Dia will shatter easily if hit in the right place. It's sort of a touchy subject. Their insecurities about this leads them to choose to go to the Moon with Phos.
  • Attack! Attack! Attack!: Dia's fighting style, which is very reckless.
  • Big Brother Worship: Really seems to adore Yellow Diamond.
  • Bishie Sparkle: Constantly sparkles, and they're also considered the prettiest of all Gems. Even at night they shine brightly.
  • Clothing Damage: Their Pimped-Out Dress is shredded by Bort during their battle on Earth. However, this does nothing to slow Dia down.
  • Cloudcuckoolander: Called "airy" by Benito when they lament that Dia and Yellow have been partnered together.
  • Covert Pervert: They express interest in seeing Cairngorm and the Prince sleeping together in the Lunarians' mineral oil. Cairngorm is highly embarrassed and denies them.
  • Cuteness Proximity: To the Shiro plushie that Red Beryl stitched for them.
  • The Cutie: Dia is a sweetie and loves cute things. The gem introductions at the beginning of each volume point this out constantly.
  • Emotions vs. Stoicism: The Emotional side of the conflict with Bort. Dia's problem with Bort stems from Bort's cold and strict attitude towards them coming off as being condescending.
  • Foil: To Cinnabar. Despite being born in the same year, Dia is loved and popular, whereas Cinnabar is isolated due to their poison. Dia is also of harness 10, the highest hardness there is, while Cinnabar is a lowly 2. Dia treats Phos with straightforward kindness, whereas Cinnabar acts abrasively towards Phos.
  • The Gadfly: Likes to tease Cinnabar about their infatuation with Phos.
  • Glass Cannon: They have high offensive power, but don't have the toughness needed to compensate for it and their body breaks easily when using their full strength.
  • Go Out with a Smile: Dia smiles when they shatter Bort, as their upper body falls apart due to their Mutual Kill. It's also a freaky Slasher Smile.
  • Green-Eyed Monster: Towards Bort and their fighting capabilities, though Dia really wants to love them.
  • Grievous Harm with a Body: Beats Shiro by using their own torn off leg.
  • The Heart: They're on good terms with all the gems but their partner Bort and therefore does things like comforting Phos or relaying orders to Cinnabar.
  • High-Class Gloves: Wears opera gloves, like all the other diamond-class gems. Dia's gloves are white.
  • I Can Still Fight!: Very prone to doing this, since Dia doesn't want to feel surpassed by Bort.
  • Idol Singer: Becomes one on the Moon.
  • In-Series Nickname: Dia.
  • Love Freak: Dia loves romance, and gushes when some romantic happenings go on.
  • Mutual Kill: Their final fight with Bort ends like this, with Bort's whip splitting Dia in two and shattering their upper body, while Dia's sword cuts Bort's head and part of their torso in two. Dia gets the last laugh, having finally defeated their former rival.
  • One Sided Rivalry: Although Bort is aware of Dia's inferiority complex, Dia puts more stock into becoming the other Gem's equal or better while Bort shows no interest. This is especially noticeable in their confrontation after the 220 year timeskip: Dia's grudge has been nursed for centuries, while Bort has let their anger and strictness go.
  • Pimped-Out Dress: Their sleepwear is some of the fanciest and upon going to the moon, they begin to wear one regularly.
  • Pyrrhic Victory: Bort's expression and resignation during their duel in the second Raid all but states that the Gem let Dia hit them. The manic smile Dia gives after getting hit themselves implies that they knew the win they wanted for so long wasn't truly earned.
  • The Resenter: Resents Bort, seeing Bort as a braggart who enjoys lauding their superior skill over Dia through verbal abuse.
  • Screaming Warrior: Against Shiro.
  • Shipper on Deck: For Phos and Cinnabar. Also seems to enjoy watching Cairngorm and Aechmea.
  • Smarter Than You Look: Despite being reckless and somewhat ignorant, Diamond is the first one to notice that Phos is telling white lies about the Moon and confronts them directly.
  • Tareme Eyes: Befitting their gentle nature and sweet personality.
  • Teeth-Clenched Teamwork: With Bort, if there even is a teamwork to begin with. Although they're both extremely capable and competent fighters, Dia hates how Bort keeps criticizing their fighting technique and finds Bort condescending.
  • ¡Three Amigos!: With Bort and Yellow Diamond.
  • Troubled, but Cute: Described as such in the volume 7 character introduction.
  • Took a Level in Jerkass: Dia's become much more selfish on the moon. Where they would once assist any gem, they have to be coaxed into helping Phos, and over the time skip they have become much more murderous, their resentment for Bort growing into the urge to grind them into dust.
  • Unknown Rival: After the 220 year time skip, Dia expresses their desire to fight Bort one on one. Bort's indifference to the affair sets Dia off.
  • Unlimited Wardrobe: After the 220 year time skip they are never seen in the same outfit twice, even changing right before going to Earth to destroy Bort.



Voiced by: Ayane Sakura (Japanese), Genevieve Simmons (English)

The strongest of all gems, not counting Kongou-Sensei. Partnered with Dia and later with Zircon; was also briefly Phos' partner during the time when Sensei was asleep. Possesses the ability to not let damage spread to the rest of their body, which makes Bort near impossible to shatter.

  • The Ace: Bort is a prodigy at fighting, and structurally, they are the strongest gem.
  • Anger Born of Worry: They get very peeved with Dia in their introductory chapter, but only because Dia decided to fight recklessly with a new style and a broken arm.
  • Aw, Look! They Really Do Love Each Other: While Bort is rarely openly affectionate with anybody, it's worth noting that they call Diamond "nii-chan" when things get serious— a big sign that the Gem cares more than they let on. The English translation makes this more obvious by changing "nii-chan" to "Didi".
  • Awesomeness by Analysis: Is very analytical during battles against the Lunarians, and, as Phos discovers, and doesn't take risks. Bort also notices others' weaknesses, and doesn't shy away from pointing them out, which drove Dia away, as it made Dia feel like Bort was lauding their superior combat skills over them.
  • Big Damn Heroes: Bort comes to the aid of the other gems in the nick of time at several points of the story.
  • Black-and-White Morality: Unflappable against opinions from enemy factions, which makes all of Phos' information regarding Sensei's true purpose and function fall on deaf ears. This ends up being justified, as not only are the Lunarians revealed to be Omnicidal Maniacs willing to destroy everything to enter the afterlife, but Phos becomes increasingly more like them as they suffer failure after failure while completely buying into what they say despite stating otherwise.
    "I don't trust what a Lunarian says!"
  • Blood Knight: A battle maniac. Extra material says that they don't care about anything but fighting.
  • Brutal Honesty: To Phos, regarding Bort's ability in battle or level of usefulness overall. Bort is also very blunt with pretty much anyone. Dia hates this part of them.
  • Crippling Overspecialization: Bort is almost unable to be broken, but when they finally are broken (their leg is cracked off by Phos) their fragments are too small to be used to repair them and their hair has to be used to plug the cracks instead.
  • Emotions vs. Stoicism: The Stoic side of the conflict with Dia. Bort is cold and Innocently Insensitive in their criticism of Dia, leading to Dia being hurt and distancing themselves from Bort.
  • Half the Man He Used to Be: The end result of Bort's fight with Dia.
  • Hidden Depths: Bort loves watching jellyfish and kept a journal of jellyfish breeding. after the 200 year time skip, Bort gave up fighting and decided to tend to jellyfish.
  • High-Class Gloves: Wears opera gloves, like all the other diamond-class gems. Bort's gloves are black.
  • Improbable Weapon User: Bort's hair is hard enough that the gem can use it to cut down enemies.
  • Innocently Insensitive: Despite their trying to improve and criticize Dia's fighting ability, Bort had absolutely no idea how it was contributing to Dia's inferiority complex. After the 200 year time skip, Bort's simple statement that they gave up fighting also triggered Dia's anger to a boiling point, causing them to go berserk.
  • Jerk with a Heart of Gold: Part of the reason their relationship begins to falter with Dia is that while Bort might have good intentions, they have no interest in being kind or sugarcoating their words.
  • Made of Iron: One of the hardest gems, and the hits Bort can take don't spread to the rest of the gem's body.
  • Master Swordsman: The very best. After losing their sword, Bort switches to using a whip.
  • Mellow Fellow: All of Bort's fighting spirit washed away over the centuries after the Lunarians stopped attacking. As a result, Bort's become a mostly calm Gem who just tends to the jellyfish.
  • Mr. Fanservice: Gets a lot of ass-shots in the manga when they're fighting in their summer uniform. Alternatively could be interpreted as Ms. Fanservice because of the ambiguous gender presentation of the gems.
  • Nice Job Breaking It, Hero: Their interruption of Adamant’s prayer for Phos ultimately becomes a large part of the latter’s motive for their later Roaring Rampage of Revenge.
  • Not so Above It All:
    • The gem may be battle hardened and serious, but they aren't above Cuteness Proximity and very much love the jellyfish around the area, finding them cute. Their diary about jellyfish grooming is far more expressive than Bort externally is.
    • They're seen visibly holding back laughter along with Jade and Dia when Ventricosus lands on Sensei's head.
    • In the manga they blush slightly when Sensei pats their head.
    • The Shiro incident basically turns Bort into The Comically Serious once the Lunarian turns back into its puppy like form which culminates in Bort's cracking due to Yellow Diamond holding one of the Shiros from sheer shock.
  • Prehensile Hair: Uses it as blades to cut Phos to pieces.
  • The Quiet One: Which makes Zircon very anxious when the young gem partners up with Bort for the first time.
  • Raven Hair, Ivory Skin: Has the darkest hair of all the gems.
  • The Reliable One: To the point that most other gems consider it meaningless to keep on fighting once Bort appears. Which ends up leading to The Worf Effect in later battles, as Bort struggling to keep up with the higher level Lunarians that start appearing means trouble for the the rest of the gang.
  • Sempai/Kōhai: Has this with Zircon in later chapters.
  • Sleepwalking: During winter, Antarc reveals Bort tends to dangerously wander around while asleep.
  • Teeth-Clenched Teamwork: With Dia, if there even is a teamwork to begin with. Although they're both extremely capable and competent fighters, Bort finds it frustrating how Dia refuses to take any of their advice to heart.
  • Spell My Name with an S: Either goes by Bort or by Bortz depending on the translation.
  • Taking You with Me: When Phos manages to shatter their leg, they use their hair as blades to cut Phos into pieces while Phos is distracted by Padparascha's sacrifice.
  • Traumatic Haircut: In the aftermath of the battle between Gems Bort's repairs to their body cost them nearly all of their hair.
  • The Stoic: Normally very calm. Since Bort's mind tends to wander only when fighting is involved, other gems have difficulty noticing what Bort is thinking.
  • ¡Three Amigos!: With Dia and Yellow Diamond.
  • Tsurime Eyes: Bort's eyes are noticeably sharper than others.
  • Whip It Good: Trades their sword for a long whip later in the manga.


Legged Doctor.

Voiced by: Yumi Uchiyama (Japanese), Shelley Calene-Black (English)

The gem in charge of fixing the other gems. Partner of the sleeping Padsparadscha.

  • Curb-Stomp Battle: Receives one from Padparadscha, the latter shattering them into little pieces.
  • Deadpan Snarker: Especially with Phos.
  • Determinator: Rutile refuses to give up on repairing Padparadscha. When trying to persuade the Lustrous into going to the Moon/turning against Sensei, this is the first thing Phos preys upon while talking to Rutile.
  • Dr. Jerk: Verily so, although Rutile does care about their patients.
  • Embarrassing Nickname: Hates being called a Quack.
  • Empty Shell: After Padparadscha surrendered themselves to Rutile to save Phos, Rutile became completely catatonic, doing nothing but staring at Padparadscha's immobile body.
  • Entitled to Have You: Felt entitled to Padparadscha due to trying to repair the other gem for hundreds of years: There are sexual undertones to Rutile's repairs, the gem remarks it "feels good" to place their hands in Pad's holes. When Padparadscha is repaired on the moon, Rutile snaps and attacks Padparadscha, calling Pads "their own" before Padparadscha shatters them.
  • Flechette Storm: Being a doctor and not a warrior, they introduce themselves to Padparadscha and Yellow Diamond by ambushing the pair with a flurry of sharpened scalpels, with more at their disposal. It happens again in Chapter 81, this time with Rutile using scalpels on Phos.
  • For Science!: Very prone on acting like this.
  • Freudian Excuse: Started studying medicine due to wanting to find a way to heal Padparadscha.
  • Japanese Delinquents: Called themselves a delinquent before they began learning medicine to heal their partner and returns to being a rude, angry person after Padparascha was taken. Of course, Japan doesn't actually exist anymore at this point, so Rutile only resembles one in spirit.
  • Keigo: They have a very professional way of speaking, being a doctor.
  • If I Can't Have You…: Rutile attempts to shatter Padparadscha when they see Padparadscha is awake because Rutile wants to be the only one to repair them.
  • Labcoat of Science and Medicine: Wears one to signify the role of a doctor.
  • Mad Scientist: Remembered as one by the Admirabilis, who consider Rutile to be a terrifying monster.
  • Married to the Job: It helps that said job is also a means of fulfilling the promise made to their sleeping partner.
  • The Medic: In charging of healing and maintaining the health of the Lustrous. It's part of the reason why, ultimately, Phos decides not to give them the choice to go to the Moon.
  • Not Worth Killing: When Phos comes across them kneeling in front of Padparadscha, they don't even bothering cutting Rutile down themselves, simply continuing to walk as the Lunarians instead dispose of Rutile.
  • The Promise: Promised to heal Padparadscha. Rutile's been working on this for hundreds of years. An omake shows that they even sometimes wake up in the middle of hibernation thinking about new ways to fix Padparadscha.
  • Proper Tights with a Skirt: A variation. They wear tights with the flared shorts of the summertime outfit, they sometimes look more like a skirt. Either way, Rutile's tights add to their prim and professional demeanor, as well as doing a nice job of highlighting their legs.
  • Sanity Slippage: After Phos took Padparadscha to the moon, Rutile slipped off the edge, no longer grooming themselves and behaving more and more unhinged as chapters progress.
  • Secretly Selfish: As much as Rutile wants to permanently awaken Padparascha, we learn over time that the sentiment is less "I want to fix Pad" and more "I want to fix Pad". They admit to Phos that they feel like it's a job they want to be able to finish to completion, and Yellow Diamond even points out that Padparadscha being awake at all following the Moon trip should be a joyous occasion, but Rutile aims for the new filled holes when attacking and only mutters "mine" as they're bifuricated in battle.
  • Seriously Scruffy: As of Phos taking Padparadscha to the moon, Rutile has snapped completely, not doing up their hair and leaving it limp and obscuring most of their face. They also don't bother to put on powder in later chapters.
  • The Shrink: Some time after becoming a Lunarian, Rutile continues being a doctor but instead focuses on therapy. No one can get injured anymore, so it's the closest thing they can do. Apparently by the time of The Party At the End, Rutile's theraputic skills have developed so well that depression levels across the Lunarian race decreased dramatically.
  • Slipknot Ponytail: Although it's not exactly a ponytail, Rutile's hair comes out of its usual singular neat curl when they jump out of a window in their rush to the infirmary after their realization that Phos has taken Padparascha.
  • Talking in Your Sleep: Tends to chatter while asleep about repairing Padsparadcha.
  • This Is Unforgivable!: Is absolutely pissed at Phos for taking Padparadscha to the Moon. Part of it is betrayal, but part of it was also because Rutile wants to bring Pad back with their own two hands. Phos taking Pad away under their nose denies the Gem that. They are still upset with Phos when we see them in chapter 77.
  • Tranquil Fury: They are not happy over seeing the fixed Padparadscha again, letting their tools of trade speak for them instead.


The Sleeper.
Click here to see Padparadscha after coming back from the moon. 

Voiced by: Romi Park (Japanese), Christina Kelly (English)

Rutile's partner. Was born incomplete, with holes all across their chest. Padparadscha thus spends most of the time sleeping, while Rutile tries to fix them. One of the oldest gems.

  • The Ace: Implied to be this even with their condition. Padparascha is regularly looked up to by younger Gems, is strong on their own right, and a very good fighter. During the night raid, they effortlessly and wordlessly slash three other gems to pieces after shattering Rutile.
  • Advertised Extra: Weirdly, they were right up front in the second row of the first volume's table of contents, in front of even Jade and Euc. Although such forward placement would usually signify a big role in the story, Padparadscha has only been seen awake in one chapter, in chapter 29 of volume 5. Their appearances after that have been limited to shots of them lying asleep in their casket. A whole 34 chapters later, Padparadscha is awake again as their holes have been filled with synthetic versions of their gem after being taken to the moon by Phos. Whether or not this will keep them awake permanently has yet to be seen.
  • Ambiguous Situation: Padparadscha is the only Gem not shown after the Lunarians convert the entirety of the Gem population minus Phos into Lunarians. Whether this was significant or not remains to be seen, given how reawakening Padparadscha has so far always happened at times of significance to advance Phos's personal plot. Eventually, The Party At the End revealed that Padparascha was converted, with their body being completely filled in as a result.
  • And Show It to You: Invoked when they take out one of their Lunarian fillings, which is effectively keeping them conscious, and tosses it to Rutile.
  • Awful Truth: Implies that the truth about Sensei is this to Phos during their talk.
  • BFS: The sword they use when they're not dead asleep seems to be bigger than their body.
  • Curb-Stomp Battle: Shatters four gems in three strokes of their sword.
  • Convenient Coma: After the night raid, Pad had their fillings removed while the Lunarians put the gem in a solution to recuperate. Pad had been under for 220 years before New!Goshe woke them up.
  • Death Seeker: Tells Phos that they're considering telling Rutile to give up in trying to fix them, as Padparadscha doesn't want to keep bothering Rutile. Like with everything else, Padparadscha seems pretty relaxed with the prospect of never waking up again. It is this confession that leads to Phos taking Padparadscha to the moon with them without Rutile's knowing. However, once the Lunarians heal them, Padparascha seems happy to be awake and alive.
  • Deep Sleep: In a constant state of this due to the gem missing parts of their body.
  • Does Not Know His Own Strength: Padparadscha accidentally shatters Phos's face just trying to get their attention.
  • Evil Costume Switch: Gets a new revealing outfit from the Moon People.
  • Fashionable Asymmetry: One of their thigh socks falls loosely over their calf, adding to their overall disheveled look. No point in putting effort into your appearance when you're only awake in hour-long intervals every few centuries.
  • Foil: To Cinnabar. While Cinnabar was important to the beginning of Phosphopyllite's quest, Padparadscha is not even introduced until the middle of the manga. Both gems have a limited amount of conversations with Phos but both have a deep impact on Phos. Both are red gems that treat Phos completely differently, Cinnabar with a tsun front and Padparadscha with open kindness. While Cinnabar's relevance diminishes as the manga progresses, Padparadscha's impact increases in each of their appearances, and while Cinnabar eventually renounces Phos, Padparadscha swears Phos Undying Loyalty and ends up critically injured for them twice.
  • Handicapped Badass: Padsparadscha, a gem born with holes inside their body that forces them to hibernate longer and longer, is still one of the best fighters bar none when awoken. As Phos recalls, with a "hardness of 9 and excellent toughness", Padparadscha was the second strongest gem after Bort. In real life, corundum gems (that is, ruby, sapphire, and padparadscha) are the hardest gems on the Mohs scale after diamonds. Even after losing a huge chunk of their memory, Phos is able to recall Padparadscha, and thinks of them as "cool".
  • Heroic Sacrifice:
    • Throws Phos out of danger with their sword rather than getting out of the way of Cinnabar's mercury and takes a direct hit to the face.
    • After the 220 year time skip, the first thing they do is go to Earth and rip a piece of themselves out to distract Rutile, who'd been about to grind what was left of Phos into dust and throw them into the ocean.
  • High-Class Gloves: In the anime, they're shown to wear white Opera gloves with their summer uniform.
  • Messy Hair: Maybe the messiest of them all.
  • Mentor Archetype: They keep Phos sane and on task when they're on the Moon, offering plenty of advice.
  • Mentor Occupational Hazard: Immediately protects Phos in a Heroic Sacrifice on their first Earth mission after going to the moon. While Pads was shown to be alive after the battle, they were critically injured and required emergency surgery to remove the mercury from their body and were kept asleep for the entirety of the time skip.
  • Ms. Fanservice: Not to the same extent as Bort, but their relevant roles so far have had them walking around with an open shirt with their shorts hanging low enough to see their V-line and in Chapter 63, after their operation to have their holes filled with synthetic Padparadscha, we're treated to a gratuitous shot of their butt in a thong as they go to speak with Phos. Alternatively could be interpreted as Mr. Fanservice because of the ambiguous gender presentation of the gems.
  • Old Soldier: One of the oldest gems, along with Yellow Diamond.
  • Parrying Bullets: Parries Rutile's ambush Flechette Storm of scalpels with a moon sword when they and Yellow Diamond come back to Earth.
  • The Promise: Rutile promised centuries ago to heal the gem.
  • Red Oni, Blue Oni: The blue to Phos's red, they encourage Phos to calm down and logically go about figuring out how to repair Sensei rather than smashing him.
  • Secret-Keeper: Heavily implied to know about Kongou-Sensei's past. Too bad they can't stay awake long enough to tell Phos. Assuming the gem would ever say anything.
  • Taking the Bullet: Gets a face full of mercury pulling Phos away from Cinnabar's attack.
  • Throwing the Distraction: They toss a piece of themselves at Rutile to distract Rutile from trying to crush Phos in Chapter 81.
  • Undying Loyalty: Professes it to Phos after the gem brings them to the Moon and seemingly cures their affliction. This extends to shattering Rutile and three other gems, as well as performing a Heroic Sacrifice for Phos.
  • Walking Shirtless Scene: No point in closing your shirt when your torso is so full of holes all the time. Even when getting a new uniform from the Lunarians, they make sure to emphasize the gem's torso by cutting a huge hole in the middle.
  • Zen Survivor: Very old, and like Yellow Diamond, they gives off this vibe. Whereas Yellow has survived for so long because of their speed, however, Padparadscha seems to have survived because they're constantly asleep. They are also shown to be highly competent in battle, taking out four gems with two slashes of their sword.


Unmovable Judge.

Voiced by: Ayahi Takagaki (Japanese), Heidi Hinkle (English)

Prolocutor/Judge of the Lustrous. Sensei's main assistant and Euclase's partner.

  • Apologetic Attacker: Against Phos when Jade has to break the gem with a well placed punch during one of Phos' psychotic attacks.
  • Bare-Fisted Monk: Uses their fists rather than a sword during battle, usually aiming for the enemy's weak spot, such as Phos' original torso.
  • Boring, but Practical: How Phos describes Jade as a fighter. Jade has a good toughness level which makes them difficult to break but has an average hardness level.
  • The Leader: Acts as a leader and judge while Kongou Sensei is not present.
  • Middle-Management Mook: Acts like this for the other Gems.
  • Not so Above It All: Despite the stern and tough image, Jade does have their moments of silliness. They try to punch Kongou awake and screams over exaggeratedly when they break their hand. They also have a not so subtle range of expressions.
  • Red Baron: The Unmovable Judge/Chairman.
  • Sexy Secretary: Jade's role, along with Euclase.
  • The Strategist: One of them, along with the gem's partner Euclase.


Lustrous Secretary.

Voiced by: Mamiko Noto (Japanese), Serena Varghese (English)

Secretary for the Lustrous, as well as Jade's partner.

  • Affectionate Nickname: Euc.
  • Big Ol' Eyebrows: Has thicker eyebrows than the rest of the gems.
  • Dissonant Serenity: Is rather laid back about everything, like the giant slug or needing to wake Sensei up to fight the Lunarians.
  • Jack of All Stats: Considered Euc's role, as the gem is good for anything.
  • Kaleidoscope Hair: As seen in the volume 6 omake, the colors of Euc's hair move around of their own accord due to changes in atmospheric pressure, and the coloring can be used to predict the weather. Euc's eyes also change color along with their hair.
  • The Leader: Very subtle, but, being the main tactician for the gems, it's clear they make the calls when Sensei isn't available, though in a more subdued way than Jade. After Sensei steps down from the position of leadership, Euclase is the one that approaches him and starts trying to negotiate for equality between the gems and Kongo.
  • Nice Guy: Especially in contrast to Jade's toughness.
  • Older than They Look: Is actually much older than Jade. Cairngorm refers to him as an elder from the same age of Yellow Diamond and Padparascha.
  • Only Sane Man: They're the only Earth gem who wants to talk to Phos and try to figure out what's happening when they take other gems to the moon and beg Sensei to pray again. Unfortunately, since the other gems overrule them, nothing comes of this.
  • Right for the Wrong Reasons: Euclase has every right to be suspicious of Phos after the gem came back from the Moon and started giving off all the information they knew, but the reason Euclase is worried is because the gem thinks Phos is either an impostor or has been taken over by Lapis.
  • Sexy Secretary: Euclase's role, along with Jade.
  • Spanner in the Works: Ruins Phos's plans to take other gems to the moon by tipping the other gem off to the fact that they suspected Phos.
  • The Strategist: One of them, along with the gem's partner Jade.
  • You Are Too Late: After the 220 year time skip takes place and Phos brings the Lunarian army to Earth, Euclase finally tries to speak with them, suggesting they go to the moon to discuss a way forward. However, since Phos had already been shattered for centuries at that point and driven to madness, their plea doesn't work and Phos simply smashes their head to pieces.

    Yellow Diamond 

Yellow Diamond
Eldest Sibling.
Click here to see Yellow in their moon outfit. 

Voiced by: Junko Minagawa (Japanese), Allison Sumrall (English)

The oldest active gem, partner of Zircon and later Diamond. Very carefree; is also the fastest of all gems.

  • Be Careful What You Wish For: One of Yellow's deepest wishes is to be able to see their old Diamond friends (Pink Topaz, Green Diamond, Ruby, and Sapphire) again and be able to apologize. The Lunarians make it possible to revive nearly every Gem, including those four, as Lunarians. They are all happy and united on the Moon, but Yellow is unable to enjoy their company due to trauma from the first Night Raid and a slowly deteriorating mental state making them despondant and senile.
  • Broken Ace: They are very capable in combat and are the fastest gemstone, but their mental state is fragile due to having lost so many of their partners. This only worsens as time progresses, with Yellow becoming near completely broken after the moon raid.
  • Broken Bird: As of the second time skip, Yellow is shown to be mentally broken, believing themselves to be a Lunarian and growing depressed when they are reminded of their true identity.
  • Broken Pedestal: Considers themselves to be one to Zircon.
  • Big Brother Instinct: To the other gems at times.
  • Cloudcuckoolander: Benito calls both Yellow and Dia too "airy" to partner with each other.
  • Cool Big Sis: Is the oldest gem of them all. All the other gems look up to them.
  • Dead Partner: Has had four of their partners taken to the moon, which Yellow blame themselves for.
  • Death Seeker: Suggests they want to fall asleep forever (like Padparadscha) or get taken to the moon, having grown tired of life.
  • Despair Event Horizon: The Night Raid took a lot out of the Gem. Upon returning to base, they haven't moved an inch and constantly claim that they're exhausted, with the rest of the Gems there looking after them.
  • Driven to Suicide: Attempts to kill themselves on the Moon by throwing themselves off a building.
  • The Fog of Ages: Poor Yellow, some time after the second Raid, has begun to go senile. They're often forgetting things and have a very loose grip on time, where their old friends have to be the Gem's minders.
  • Freak Out: Quickly begins to panic after their mission does not go as planned upon arriving back on Earth.
  • Heroic BSoD:
    • Upon learning the ultimate fate of the captured gems on the moon—getting ground into a fine dust and spread all over the surface—Yellow's reaction is to fall to their knees in despair and start literally falling apart.
    • Yellow also takes the night raid the hardest, becoming sullen and distant to the point of not joining the rest of the Moon Gems in recent activities. This seems to have lasted 200 years, as the gem is still mentally broken after the time skip.
  • High-Class Gloves: Wears opera gloves, like all the other diamond-class gems. Yellow's gloves are a yellowish-gray.
  • In-Series Nickname: The other gems refer to them as "Yellow" when they aren't calling them "Elder Brother".
  • It's All My Fault: Blames themselves for having lost four partners to the Lunarians.
  • I Want My Beloved to Be Happy: A platonic version. Yellow Diamond decides to let Zircon partner with Bort, understanding that Zircon was being held back from their true potential by partnering with Yellow. Under Bort, the other gem could flourish.
  • More than Mind Control: Aechmea tells the Moon Gems that Sensei has the ability to make all beings around him love him, which is the case for the Lunarians as well. Yellow can't reconcile this idea, still having lingering feelings for their old master and not wanting to fight him.
  • Old Soldier: One of the oldest Gems.
  • Perpetual Smiler: Seems to be always happy at first.
  • Pimped-Out Dress: Gets one as part of their moon outfit.
  • Sanity Slippage: As of chapter 79, Yellow believes they are a Lunarian and seems to have lost their mind completely during the Time Skip.
  • Secret-Keeper: Like Padsparadcha, Yellow is heavily implied to know about Kongou-Sensei's past. It's also probable that Yellow was spying on Phos as the gem investigated about the Lunarians.
  • Sempai/Kōhai: With Zircon, and the rest, being the eldest sibling.
  • Sexy Backless Outfit: After joining the Lunarians, they get this.
  • Stepford Smiler: As Yellow's own self-disgust reveals.
  • Super Speed: The fastest of the Lustrous until Phos gets a leg upgrade. They consider this to be the only reason they haven't gotten captured by the Lunarians yet, even though all their previous partners had.
  • The Tease: Very prone to this.
  • ¡Three Amigos!: With Bort and Diamond.
  • Vocal Dissonance: According to some fans of the series, Yellow Diamond's surprisingly deep and masculine voice in the Anime adaptation is this due to their somewhat feminine appearance. Given Yellow Diamond's status as a Cool Big Bro to the other gems, it can be seen as fitting.
  • Zen Survivor: Acts like this to all the other Gems.


Talented Youngster.

Voiced by: Himika Akaneya (Japanese), Brittney Karbowski (English)

The second youngest gem after Phos, and a gem of great talent. First partners up with Yellow Diamond before going with Bort.

  • The Baby of the Bunch: Especially after Phos matures, and Zircon is relegated to being treated as the youngest again.
  • Big Damn Heroes: Does this with Bort and Tourmaline to save Phos, Peridot, Sphene and Cairngorm from the Pieces.
  • Child Prodigy: Really young, but talented enough to be paired with great fighters like Yellow Diamond and Bort.
  • Devoted to You: Deconstructed with their relationship with Yellow Diamond. Zircon is fiercely loyal and dedicated to protecting their partner but, as Bort points out, because of this Zircon has let their skills stagnate and hasn't allowed themselves the opportunity to really test their own mettle in combat, instead only worrying about protecting Yellow. Therefore Zircon is partnered off with Bort in order to learn how to be a more effective warrior.
  • Naïve Newcomer: Sort of idealistic and still has a lot to learn.
  • Off with His Head!: Loses their head the first time they're seen in the manga, though Yellow is able to help Rutile repair them.
  • Sempai/Kouhai: With Yellow Diamond and later Bort.
  • Taking the Bullet: For Yellow Diamond. But since Zircon doesn't get captured, they both survive.


The Winter Guardian.

Voiced by: Mariya Ise (Japanese), Alyssa Marek (English)

Phos' first partner. They are the Winter Guardian, in charge of protecting the gems during their hibernation. The colder it gets, the harder the Gem becomes.

  • An Ice Person: Quite literally, as without the cold they're so soft they become a puddle. The colder the temperature, the harder they become. This makes them especially useful in Winter, where everyone else rests.
  • The Aloner: Unlike Cinnabar who is forced into solitude, their annual cycle makes the rest of the gems barely a part of their life, Kongou-sensei being the only exception. Their character bio describes them as acting "like an only child".
  • Astonishingly Appropriate Appearance: The Winter Guardian has a name based off of one of the coldest places in the world, and is dressed head to toe in pure white clothes.
  • Bathtub Scene: Antarc is first introduced rising out of a tub of liquid in the wintertime, firming up from the frigid air. The liquid Antarc comes out of? All of that is Antarc too.
  • Berserk Button: Just the possibility of forgetting Sensei puts them into a frenzy.
  • BFS: Wields a huge serrated-edge hatchet for breaking up ice floes. They even use it to snowboard.
  • Combat Stilettos: Wears heels that act as ice picks and help with the breaking of the ice.
  • Custom Uniform: Wears a white version of the normal suit most Gems wear. The suit seems to be designed to give them a measure of camouflage in the snow from the Lunarians.
  • Deader than Dead: While the possibility of some gems returning from being ground into dust is possible, Antarcticite was specifically said to be deader than dead, as any dust with a hardness lower than 5 has likely flown off the moon as a result of asteroid impacts, making Antarc's pieces impossible to recover.
  • Dead Partner: To Phos. They are as dead as they can be.
  • Defrosting Ice Queen: Though somewhat distant and dismissive of Phos initially, they come to warm up considerably. Not only does Antarc entrust Phos with winter duties and caring for Adamant, but most tellingly, upon revival as a Lunarian, they immediately ask to know where Phos is.
  • Glass Cannon: As shown when they fight: having even less hardness than Phos, they crack and break over literally nothing; but despite that they are able to crush Lunarians and blow up half of the Vessel Main figure in one swing of their sword each, and to split the rest of the New Model in half just by pulling it with their hands.
  • Go Out with a Smile: As they shatter into pieces before being collected, they gives Phos a smile, tells the Gem to take care of the Winter duties, and advises them to not leave Sensei lonely.
  • Heroic Sacrifice: Gets captured in order to save Phos.
  • Killed Off for Real: Captured to save Phos, and cannot be revived, as they have likely been worn away into invisible particles by now. Fortunately averted in Chapter 95, when the Gem is revived as a Lunarian.
  • The Lost Lenore: Becomes this to Phos after they are broken and taken to the Moon. Phos' mental state and actions over the course of the story have a lot to do with their guilt over not saving Antarc when they believe they could have.
  • Memetic Hand Gesture: Their most iconic pose is them raising their index finger to their lips. They did it a couple of times across the Winter arc, even before they're shattered and brought to the moon.
  • The Mentor: Of a sort to Phos during the Winter Arc. Which can only mean one thing, considering the danger of the Winter arc...
  • Not so Above It All: Becomes really embarrassed once Phos caught them asking Sensei for a hug, and later breaks down over the loss of Phos's arms, crying to Sensei and admitting they don't know how to deal with failure.
  • Passing the Torch: Saves Phos as to not to leave Sensei alone during the Winter Watch.
  • Peek-a-Bangs: One of their eyes is constantly covered by their hair strand and bangs, at all times.
  • The Reliable One: It says a lot that the Gems consider themselves safe with only them and Sensei watching over them all during the winter.
  • Reverse Armfold: Usually stands in this position.
  • The Stoic: Seems to be a rather serious individual.
  • Sempai/Kouhai: With Phos, until Antarc's capture.
  • Serrated Blade of Pain: Their weapon, which Phos later inherits for a while. It helps with their ice-cutting.
  • Small Role, Big Impact: Despite showing up for only one arc, Antarc's relationship with Phos and getting taken to the Moon ends up affecting Phos for the rest of the series, and not in a good way.
  • Sugar-and-Ice Personality: Sweet and affectionate towards Sensei but stoic and aloof to everyone else.
  • Vetinari Job Security: By the beginning of the story, and until Phos gets their upgrades, they are— along with Sensei— literally the only thing standing between the Moon People and the hibernating Gems during winter.

    Ghost Quartz 

Ghost Quartz
Library Ghost.

A gem in charge of the Library and the Hibernation Chambers. Briefly becomes Phos' second partner. Formed over another gem, and so has a Split Personality that sometimes influences them.

  • Badass Bookworm: In charge of the Library after Lapis Lazuli's kidnapping and a a very capable fighter when they really try.
  • Dead Partner: Lapis. Then Ghost becomes a second one to Phos and Cairngorm.
  • Death of a Thousand Cuts: Not exactly dead, as per the Gems immortality, but this is how they get peeled off and captured by the enemy.
  • Extreme Doormat: Their personality overall. They are not unfazed at all with criticism.
  • Heroic Sacrifice: Gets peeled off Cairngorm in an amazing fashion while protecting a broken Phos.
  • Heroic Self-Deprecation: Considers themselves to be far beneath Lapis both in Library work or fighting.
  • It's All My Fault: Averted. They put the blame of Lapis' capture on Cairngorm, and Cairngorm agrees.
  • Last Request: As Ghost gets stripped away from Cairngorm, the former asks the latter to protect Phos at all costs. Aechmea theorizes that it's less a "request" followed and more "psychological compulsion", given that Ghost's inclusions supposedly still resided in Cairngorm's eyes.
  • Leeroy Jenkins: Mostly because Cairngorm influences them from the inside, they tend to jump against the Moon People without a second thought.
  • The Lost Lenore: Lapis Lazuli.
  • Meaningful Name: The gem that tends to startle everyone and just seems to appear out of thin air is called Ghost.
    • In their brief cameo in Cairngorm's head while on the Moon, they appear as a ghost-like figure that haunts Cairngorm.
  • Rei Ayanami Expy: A troubled, subdued gem with silver hair who becomes more emotional due to a crippling injury (being peeled off of Cairngorm, their more emotional personality).
  • Sugar-and-Ice Personality: Comes off as creepy and subdued at first, but shows warmth and devotion to Phos once they spend time together.
  • Talking to Themself: While talking to their inner Gem.
  • Sinister Scythe: Their weapon of choice.
  • Spin to Deflect Stuff: Pulls this move on the Moon People arrows with their scythe. Subverted perhaps in that it is not a good enough move and they get shaved off of Cairngorm.
  • Split Personality: Has one with Cairngorm due to forming on top of them. As shown when Ghost is pulled away from Cairngorm, Ghost was not fond of the other gem and blamed them for multiple failures.
  • Stealth Hi/Bye: They are very prone to doing this, and thus is how they named them. The other Gems, including Phos, tend to not notice their presence.
  • Teeth-Clenched Teamwork: With Cairngorm, the other gem inside them. While Ghost was usually in charge of their body, Cairngorm's impulsive tendencies would often put them in danger and in Ghost's eyes lost them their partner, Lapis. Ghost resented Cairngorm for this loss and as their Last Request demanded they protect Phos at any cost.
  • Throwing the Distraction: They toss one of their arms at the Lunarians to try to distract them away from Phos.
  • The Symbiote: With Cairngorm, as they formed over it.
  • Undying Loyalty: To Phos. Ghost states they will do anything for Phos, and eventually allows themselves to get pulled off of Cairngorm to save Phos's life.


Jerk With A Heart (of Gold).
Click here to see Cairngorm as the Moon Princess 

The gem that Ghost formed over. They are in charge of the Hibernation Chambers where the pieces of recovered gems are kept, the Library and later becomes the Winter Guardian in absence of Phos. They are also Phos' third partner. Later they become the Princess of the Moon as Aechmea's wife.

  • 100% Adoration Rating: The Lunarians adore Cairn as the Princess, seeing the Gem as a cute, polite, and loyal wife to Aechmea.
  • An Arm and a Leg: Cairngorm's left arm is always coming off. The original arm was taken off just before Ghost sacrificed themselves, so they have it replaced with smoky quartz later. It comes off a second time, which leads to Phos losing their head when they try to retrieve it. Following their Freak Out, the arm comes off yet again and the gem has it replaced with artificial Cairngormite. Unlike other times when Gem parts are replaced, Aechmea mentions that it needed glue and a cast to set, meaning it doesn't quite sync up with the rest of the body.
  • Berserk Button: Gets very angry when someone questions their decisions due to their insecurity over their lack of autonomy.
  • Body Motifs: Arms. Cairngorm doesn't have their inclusions take to other materials well, so their left arm is always in focus during important scenes.
  • BFS: Like Antarc, Cairngorm uses a serrated blade when they take over the winter shift.
  • Brutal Honesty: Very prone to just flat out stating the truth, including to Sensei on regards of the possibility of gems actually coming back from the Moon.
  • Combat Stilettos: Like Antarc and Phos before, Cairngorm wears heels as part of their outfit for the winter shift.
  • Custom Uniform: Wears a white uniform like Antarc once they take over the winter shift. It helps hide them in the snow from the Lunarians.
  • Deadpan Snarker: Might be better than Rutile at this.
  • Death Seeker: Apparently, while Phos was unconscious for those 102 years, Cairngorm wanted nothing more than to die. The Gem also had a habit of listening to the ice floes during Winter. They've gotten better, but their desire to go to nothingness with the rest of the Lunarians is also this.
  • Declaration of Protection: Vows to keep Ghost's word and keep Phos from harm. According to Prince Aechmea, the main reason they even do this is because a small fraction of Ghost's inclusions supposedly resides in their eyes.
  • Dub Name Change: Called "Morion" in the French translation.note 
  • Everyone Calls Him "Barkeep": Post timeskip, Cairngorm most often goes by Princess.
  • Evil Costume Switch: Wears a Pimped-Out Dress and a veil after joining the Moon People.
  • Fantastic Racism: Very spiteful and hateful of the Moon People. Gets over it very quickly once their eyes are replaced.
  • Face–Heel Turn: Joins the Lunarians and commands a legion of them to rescue the moon gems.
  • Foil: To Antarcticite. Both are Phos' major partners, but they eventually lay on opposite sides of the conflict; Antarc favors and follows Sensei, while Cairngorm does the same for Aechmea. The gem collection art book makes them parallel each other even less subtly, with both of their busts propped up by the affectionate hand of their mentor.
  • Fourth-Date Marriage: Although the exact time frame of the relationship is never mentioned, some Gems have commented on how fast Cairngorm and Aechmea took to each other, culminating in a "purely" political marriage to signify the Gem/Lunarian alliance.
  • Freak Out: Starts falling apart when the Prince tells the gem Ghost Quartz has been forcing them to protect Phos through inclusions in their eyes.
  • Friendship Denial: The gem had done it several times before, claiming that all the things they do for Phos is out of obligation and not because they're actual friends.
  • Gilded Cage: For all of the Gem's talk about being independent of Ghost, Cairngorm as the Moon Princess is still in many ways restricted. They get whatever they ask for material wise and the Lunarians always try to accommodate them, but they can't do anything without Aechmea's say so and the one time the Gem did go off on their own, Aechmea was furious.
  • Girliness Upgrade: After siding with the Lunarians, with this becoming Cairngorm in both appearance and personality due to Aechmea's influence. They're even more this trope, being the first gem to be gendered (as female, in this case) by the Lunarians, though it's doubtful that Cairngorm even fully comprehends the concept of femininity.
  • Hair-Trigger Temper: Ghost described the gem as somewhat reckless and violent when ticked off. When Cairngorm is finally shed of Ghost, we see it immediately, punching Phos three times because they blamed the other gem for everything going wrong.
  • Happily Married: To Aechmea, as seen following the 220 year time skip.
  • Hidden Depths: They really like feminine clothing, as we learn on the Moon. As for why they never spoke up about it, see What Would X Do? below.
  • Huge Guy, Tiny Girl: Aechmea positively towers over Cairngorm, with the Gem coming up to at least his waist.
  • Hypocrite:
    • Reprimands Phos for taking Prince's words at face value, yet falls for his words and joins the Lunarian side after one conversation with him.
    • They call Phos selfish and dismissive of the other Gems' feelings yet they themselves decide that spending time with Aechmea as his wife is more important than anything else, including warning Phos that Sensei's prayer would destroy Gem and Admirabilis life as well as the Lunarians.
  • Identical Stranger: According to Phos, they look just like Antarc save for the black skin and shorter hair. After they finally put on powder and wears the white Custom Uniform Antarc was usually seen wearing, the similarities become more apparent. This was by design, as Ghost was forcing Cairngorm to look and act like Antarc to be a better partner to Phos.
  • I Just Want to Be Free: Despite caring for Ghost, Cairn screams that they want to be free from Ghost's influence when they're told that Ghost is still influencing them through their eyes. They had hardly been their own person until Ghost was chipped off of them, so they have subconscious fears of their new identity being stripped away.
  • Interspecies Romance: With Aechmea, a Lunarian. Perhaps downplayed as both species were originally descended from humans.
  • It's All My Fault: Entirely agrees on this regarding Lapis being captured while talking with Ghost. They appear to get over it upon replacing their eyes.
  • Jerkass Has a Point: While they were pretty harsh in explaining themselves and fully distancing themselves from their time on Earth, Cairngorm does bring up a good point; Phos needs to be more in tune with how the people around them feel about their plans, not just make everyone follow their lead.
  • Jerk with a Heart of Gold: While they initially hated Phos and pushed all the blame for the gem being taken to the moon on them, Cairngorm thought of offering their own head at one point just to save Phos, and still frequently tries their best to be a good partner for them.
  • Leeroy Jenkins: Just like their previous incarnation.
  • Living Emotional Crutch: To Phos, especially after the captures of Antarc, Ghost, Morga, and Goshe. They're even willing to act like Antarc if it makes Phos happy, and Aechmea himself says Phos is stable around them.
  • Master Actor: According to Phos.
  • Meaningful Rename: Three times; first from Ghost to Cairngorm, then later rejects the name Cairngorm and takes on the name Princess. When turned into a Lunarian, Aechmea renames them again.
    • Meaningful Name: Their Lunarian name, Welegato, apparently was an invented word meaning "abundant" and "transcendent" in a language that was lost before the start of the series.
  • Mind Control: Cairngorm is told that they're being compelled by Ghost Quartz's memories, located in their eyes, to protect Phos at any cost.
  • Mistaken Identity: During the Night Raid, many Earth Gems mistook Cairngorm for a small Lunarian, due to their center position and their dress concealing their identity. Better seen in the volume 9 redraws, where Cairngorm is intentionally kept vague looking throughout their screentime that chapter.
  • Ms. Fanservice: As of the Moon Arc they most often go around in undergarments and Pimped Out Dresses, veering heavily towards revealing feminine clothing.
  • The Napoleon: The smallest gem of all and one of the most irritable and violent.
  • Non-Standard Character Design: Upon their introduction and after going to the moon and deciding to stop wearing powder, Cairngorm has black skin and white hair unlike the white skinned gems. Cairngorm is also explicitly the smallest gem in terms of height and size due to Ghost having formed on top of them.
  • Only Sane Man: Tends to act like this to the gems, and specially Phos.
  • Playboy Bunny: Supplemental art has depicted them wearing the outfit, likely as a play on the concept of the Moon Rabbit.
  • Secret-Keeper: They are the keeper of Aechmea's secrets and is the only gem he has fully communicated his plans to.
  • Serrated Blade of Pain: Their weapon as the Winter Guardian, just like Phos.
  • Replacement Goldfish: Just as Phos offered to be a replacement Lapis, Cairngorm unfailingly offers to be Phos' replacement partner, whether it be for Antarc or for Ghost. Goes to obsessive levels in Chapter 66, where they tell the Prince they're willing to get artificial Antarcticite grafted onto them and throw away their identity if that will be what it takes to give Phos peace of mind.
  • Sickeningly Sweethearts: With Aechmea. The only problem with this is that Cairngorm has no genuine idea what kind of relationship they're in right now, seeming to like Aechmea but not having the background to understand what a "wife" is. They become genuinely more lovey-dovey as the centuries roll on.
  • Sinister Scythe: Uses Ghost's scythe after Ghost's capture.
  • Somebody Else's Problem: After talking to Aechmea, Cairngorm couldn't care less about Phos' activities or the activities of the rest of the Lustrous, preferring to support Aechmea and focus on learning more about science and the Lunarians.
  • Take Up My Sword: Takes Phosphophyllite's place as the Winter Guardian during the 102 years Phos is asleep.
  • Talking to Themself: They were the "other Gem" inside of Ghost, who sometimes made themselves known by being more brash than usual.
  • Talk to the Fist: The first thing they do when meeting Phos face to face is to punch them so hard Phos's face breaks.
  • Teeth-Clenched Teamwork: With Phos, to a degree. They end up functioning very well as a team.
  • That Man Is Dead: Upon replacing their eyes, Cairngorm denies all parts of their life inside Ghost and after they're given a new name, saying that the things they did and the partnerships they had were all Ghost's doing. They also reject being called Cairngorm, saying that they never liked the name personally. As of the 220 year time skip they have taken on the title of Moon Princess as their new name.
  • The Symbiote: They lived inside of Ghost, and only end up becoming autonomous when Ghost gets peeled off them.
  • The Promise: Promised to Ghost to protect Phos, which motivates a lot of what they do.
  • Unlimited Wardrobe: After going to the moon, Cairngorm is almost never seen in the same outfit twice, not even on the same day.
  • Vitriolic Best Buds: With Phos. Although they bicker a lot, Cairngorm really does care about them. Noticably, unlike the other gems Phos takes to the moon, Cairngorm has no underlying motive to accept Phos' invitation— they just go because Phos asked them to. However, this is called into question later when Aechmea insinuates that Cairngorm is being compelled to obey and protect Phos through leftover inclusions, meaning they may not have had a say in the matter.
  • Walking Spoiler: You can't really mention the Gem without mentioning that Ghost peeled off from them.
  • What Would X Do?: A lot of the Gem's internal struggle has to do with them denying parts of their real self in order to accommodate Phos, by being the perfect Antarcticite stand in. The example Cairngorm gives has the Gem stray away from more flashy and feminine clothing because "Antarc would never do that".
  • When They Smile: Cairngorm isn't the most chipper person when released, and doesn't smile at all around the other Gems. However, they smile for real on the Moon when they're with Aechmea, presumably because they feel like he's the one person who encouraged their need for individuality.
  • You Are Worth Hell: Decides that they are willing to follow Aechmea into oblivion following the pair's wedding in chapter 75. However, in Chapter 76, their reaction to "fade away into nothingness" seems less like they know they're going to be Together in Death if the gem goes through with it, and more like they'll end up somewhere else.


The Naughty One.

Voiced by: Mutsumi Tamura (Japanese), Olivia Swasey (English)

A daring gem that mocks Phos. They are the partner of Goshenite.


The Gentle One.

Voiced by: Saori Hayami (Japanese), Juliet Simmons (English)

A gentle gem. Partner of Morganite.

  • Affectionate Nickname: Goshe, or Goshen as in the English translation.
  • Jumped at the Call: The second Goshe practically jumps aboard when Phos offers to take them to the Moon.
  • Nice Guy: A rather sweet and pleasant person, if not much else.
  • Red Oni, Blue Oni: Blue to Morga's Red.
  • Sempai/Kōhai: The original Goshe played a quiet but nice senpai to Phos. The new Morganite and Goshe stick to Phos like glue after Phos wakes up again, and refer to Phos as "sempai".
  • Suspiciously Similar Substitute: Both Morganite and Goshenite were taken away by the Lunarians during the Timeskip, however, both identical gems were born after it from the Beach of Beginnings.
  • Those Two Guys: With their partner Morganite.
  • Toxic Friend Influence: Morganite is this for them.

The Second Goshenite

A Gem that was born 87 years after Phos went unconscious. A curious and upbeat Gem.
  • Blood Knight: New!Goshenite shapes up to be this.
  • Cool Board: When Goshe is brought to the Moon, the Gem takes a big interest in skateboarding and even becomes a professional boarder in the 220 years before the second Raid. The Party At the End establishes that Goshe has become famous for their boarding skills.
  • Totally Radical: nuGoshe speaks like this post-time skip after spending centuries on the moon.

    Red Beryl 

Red Beryl
Fashion Tailor.

Voiced by: Maaya Uchida (Japanese), Cat Thomas (English)

A gem in charge of the making of clothes for everyone. Very obsessed about fashion.

  • Expository Hairstyle Change: Their hairstyle changes in every arc to showcase their fashionable nature.
  • The Fashionista: Their role and attitude as the clothes designer. They believe that everybody deserves to have cute clothes, and they can get inspiration for clothes from pretty much anything. Naturally, when they get converted into a Lunarian, Beryl begins collaborating with the similiarly fashion-obsessed Quieta and her studio.
  • Freak Out: Throws themselves off a cliff after Phos takes gems to the moon.
  • Girlish Pigtails: Most times they wear their hair like this.
  • Married to the Job: They are very fixated on what they do.
  • Missed the Call: Phos was intending to take them to the moon too, but ran out of time to convince them and ended up leaving them behind.
  • Motor Mouth: When defending fashion, they go on and on with long ramblings.

    Amethyst 84 & 33 

Amethyst 84 & Amethyst 33
Crystal Twins.
Click here to see Amethyst 84 after the 220 year time skip 

Voiced by: Kanae Itou (Japanese), Teresa Zimmerman (English)

Two gems born of the same type, who pair together. No one knows which one is which.

  • Battle Couple: They are both paired together during battles.
  • Braids of Action: One surrounding each of their heads.
  • Coordinated Clothes: Usually wear the same style of clothing, probably to maintain the confusion about which one is which.
  • Creepy Monotone: The anime has them talking like this.
  • Divergent Character Evolution: Discussed: 33 wonders whether them being so similar isn't a problem and wants to be able to act independently. 84 overhears this conversation and decides to impersonate 33 to protect them from the moon, leaving them behind and allowing 84 to develop their personality independently of 33.
  • Finishing Each Other's Sentences: Very prone to doing this.
  • Four-Temperament Ensemble: One of them is sanguine, while the other is phlegmatic.
  • The Gadfly: They both enjoy teasing Phos a lot.
  • Good Job Breaking It Hero: Two times, actually. First, the got shattered by the Lunarians while trying to impress Phos, and later, they scatter the first Lunarians to ever communicate with Phos because it was an enemy.
  • Identical Twin Id Tag: Generally, 33 has their braid on their right eye, and 84 on their left. It's such a slight difference that nobody really notices it, nor do they care, and the pair enjoy having others be confused. 84 drops this on the moon, wearing their braid like a headband instead, and when 33 becomes a Lunarian they wear their hair in a long braid.
  • Important Haircut: After the time skip Amethyst 84 ditches their side parted hair and wears their hair more straight, no longer pairing with 33's hairstyle.
  • Labcoat of Science and Medicine: 84 begins to wear one on the Moon once they take up science.
  • Like Cannot Cut Like: Being the exact same material and of exactly equal hardness, they can't break each other.
  • Master Swordsman: Noted to be really proficient in sword skills.
  • Non-Indicative Name: They are the only Amethysts, not the 33rd and 84th of their kind. The numbers refer to the overall birth order of the gems.
  • Single-Minded Twins: To the point no one really cares anymore to which one they are talking to, and neither do the twins. Dropped when 84 decides to go to the Moon.
  • Trickster Twins: They like pulling pranks on the other Gems.
  • Twin Switch: 84 switches places with 33 during the trip to the Moon, in order to protect the latter. To trick Phos, they style their hair the way 33 styles it.


Moon Geek.

Voiced by: Rie Kugimiya (Japanese), Shelby Blocker (English)

The gem in charge of collecting information about the Lunarians. Has a split personality in the form of a crazy berserker that kills any Lunarian on sight.

  • Admiring the Abomination: Is really interested in Shiro, coming from the Moon and all of that.
  • Affectionate Nickname: Alex-Chan.
  • Awesome, but Impractical: Red Alex. While Red is easily one of the best fighters among the gems, they are unhinged and completely unable to be reasoned with. Nothing will stop them from fighting except being completely incapacitated in some way, either by losing all their energy or getting shattered.
  • Axe-Crazy: Red Alex is definitively this, to the point they decapitate themselves trying to keep fighting when restrained.
  • The Berserker: Red Alex, who only comes out in an Unstoppable Rage mode.
  • Cloud Cuckoolander: Mostly spaces out and seems overexcited with anything related to the Lunarians.
  • Curb-Stomp Battle:
    • Utterly destroys Shiro as Red Alex, an impressive feat considering Dia and Bort's inability to contain him.
    • Red Alex later curb stomps the entire Earth gem faction minus Cinnabar, Euclase, and Bort (who'd already been shattered by Dia).
  • Death Glare: Red Alex gives an unnerving one when Phos throws Shiro towards the gem.
  • Dull Surprise: While finishing reports and seeing Shiro chasing Dia over the hallway.
  • Fiery Redhead: Red Alex, of the batshit violent variety.
  • Freudian Excuse: Both the gem's hate and interest in the enemy seems based on the fact that Alex's partner Chrysoberyl got snatched away many years ago by them.
  • Handicapped Badass: They are incredibly potent in combat... As Red Alex, who is Axe-Crazy and can only focus on fighting. They might be one of the strongest gems if not for that one flaw. Their strength is shown to only be surpassed by Padparadscha and Bortz, as they easily curb stomp every single other gem in their path.
  • Heroic BSoD: Upon learning the ultimate fate of the captured gems on the moon—getting ground into a fine dust and spread all over the surface—Alex's reaction is falling to their knees in despair and start literally falling apart.
  • Hidden Depths: Loves cooking and food when they finally get to try it.
  • Incoming Ham: Alex's first appearance on Chapter 14.
  • Irony: Red Alex was the result of Alexandrite's rage against Lunarians for taking away Chysoberyl. When Red Alex is last used, it is in service of the Lunarians, against the Gem's own race.
  • Off with His Head!: They decapitate themselves in red form when Benito tries to stop them from shattering Neptunite.
  • Old Soldier: One of the oldest gems.
  • One-Way Visor: They are shown wearing one on the Moon after the time skip, likely to prevent them from transforming into Red Alex in the presence of Lunarians.
  • Otaku: The normal Alexandrite, for anything related to the Lunarians. As it turns out, as Normal Alex their obsession with them and desire to learn more mainly stems from their desire to overcome their condition that drives them crazy when they see a Lunarian.
  • The Lost Lenore: Chrysoberyl.
  • Power Dyes Your Hair: Alex's hair turns red when they transform into their other personality.
  • Screaming Warrior: Gives an impressive roar after cutting Shiro into pieces.
  • Sincerest Form of Flattery: Imitates Kongou-Sensei, Buddhist clothes and all, while trying to teach Phos about the Lunarians.
  • Split Personality: Divided between the blue, ditzy and geeky personality and the red, who is a crazy Lunarian hater who slaughters them on sight. Because of this, Kongou-Sensei ordered that Alex should be forbidden for seeing any Lunarians, as they cannot control their transformation and Red Alex is The Berserker.
  • Split-Personality Takeover: Discussed in Chapter 73: Alexandrite wants to be Red permanently and wants Phos's help to do it in order to be able to protect Phos and get the other gems repaired. Phos ultimately denies them this, stating that it would be immoral.
  • Supreme Chef: They've become one on the moon. Lunarians flock from all around to eat their cooking.
  • Suspiciously Specific Denial: In the omakes. Alex isn't doing the job because they like it or anything...
  • There Is No Kill like Overkill: As Red Alex, they utterly trounce Shiro, and then do it again, breaking Shiro into little pieces.
  • Unstoppable Rage: As Red Alex they're unable to be calmed and will destroy any Lunarian they come into contact with.


He tries.

Voiced by: Ari Ozawa (Japanese), Elissa Cuellar (English)

A gem whose room is next to Cinnabar's. Partner of Neptunite.

  • Affectionate Nickname: Benito.
  • Butt-Monkey: Tends to get the short end of the stick most of the times.
  • Corner of Woe: Done when they ruin the plan to face the multiple appearing Sunspots.
  • Extreme Doormat: They can't say "no" to someone asking for their help. This bites them in the ass when they are incapable of handling Red Alex.
  • The Generic Guy: Sees themselves as this, given their lack of quirks compared to the other Lustrous. Their desire to become less generic leads to them accepting Phos' offer to go to the moon.
  • Good Job Breaking It Hero:
    • Due to their inexperience, they ruin the entire coordination plan to capture the New Vessel. While they blame themselves a lot about it, the other Gems are very kind and do not mind that much.
    • They're simply unable to keep Red Alex in check and the gem causes way more destruction to the Earth Gems than both Benito and Alex intended because of this.
  • Hidden Depths: Benito is actually pretty perceptive; they're the only Gem that verbally objects to Alexandrite trying to stay locked in Red mode, citing all of the other Gem's problems with their physiology.
  • Kid with the Leash: They literally hold Red Alex on a leash to try to mitigate their damage to the Earth gems. This backfires when Red Alex is significantly stronger than Benito and simply flings them around and accidentally beheads them.
  • Off with His Head!: Is accidentally decapitated when Red Alex's head crashes into theirs.
  • Shipper on Deck: Seems to think of Phos and Cicada in the same type of relationship as Aechmea and Cairngorm.
  • Those Two Guys: With Neptunite.


Sharp tongue.

Voiced by: Atsumi Tanezaki (Japanese), Carli Mosier (English)

A very serious gem, partner of Benitoite.


Small blacksmith.

Voiced by: Ryō Hirohashi (Japanese), Shanae'a Moore (English)

The gem in charge of designing and making the weapons everyone use in battle.

    Watermelon Tourmaline 

Watermelon Tourmaline
Shocking when angry.

Voiced by: Sayaka Harada (Japanese), Jessica Portillo (English)

A gem with the ability to release lightning. Partner of Hemimorphite.


Aspiring Intellectual.

Voiced by: Reina Ueda (Japanese), Aimee Heimbuecher (English)

One of the youngest gems, partner of Tourmaline.


Mature and Smart.

Voiced by: Houko Kuwashima (Japanese), Jessica Portillo (English)

One of the oldest gems, partnered with Sphene. An intellectual in charge of making paper.

  • Dead Partner: Blue Zoisite.
  • Dissonant Serenity: Rather unfazed by everything.
  • Married to the Job: Obsessed with making paper, their occupation.
  • Not so Above It All: Very focused and mature, until the moment paper is involved. They are known to sleep covering themselves in freshly made paper and laughing.
  • Those Two Guys: With Sphene.
  • Sempai/Kōhai: Is one of the oldest gems, along with their partner Sphene, Yellow Diamond, Padparadscha and Alexandrite, and as such treats all their juniors like a sempai would.
  • The Smart Guy: Described as this.


The Repair Man.

Voiced by: Hitomi Nabatame (Japanese), Natalie Jones (English)

One of the oldest gems, partner of Peridot. Their job is to repair things.


    Lapis Lazuli 

Lapis Lazuli
Bibliotecary Head.

The former Head of the Library and Mentor for Ghost Quartz and Cairngorm, as well as the investigator on the Moon People. Currently captive on the Moon.

  • Awesomeness by Analysis: Subverted. While Lapis was a competent fighter, their inability to stop thinking distracted them as they were trying to analyze the Moon People and resulted in their decapitation.
  • Badass Bookworm: Was head of the Library, and according to Ghost an overall good fighter.
  • Beautiful Dreamer: Their first appearance is as a beautiful and serene looking head.
  • Bequeathed Power: Gives their intelligence to Phos in the form of their head during a dream sequence.
  • Character Tics: Flipping their hair behind their shoulders. Cairngorm freaks out when they see Phos do it with Lapis' head.
  • The Corrupter: To Phos. Once Phos receives Lapis' head in place of their own, Phos begins having conversations with Lapis that go a long way towards making Phos suspect something more is wrong with Sensei. Phos also begins acting more secretive and manipulative thanks to Lapis' influence.
  • Hime Cut: Though their bangs have a minor part to the right, they have the straight hair reaching to their waist, blunt bangs, and even small side locks. It emphasizes their elegant beauty.
  • Hyper-Awareness: Their intelligence gave them that power, which Phos inherits after getting their head.
  • Killed Off for Real: Likely, since though they could be remade their head permanently belongs to Phos now, as Phos's head cannot be remade. After all of the Lustrous became Lunarians, Lapis remained the only Gem that wasn't converted or even revived, making them the only permanent loss of their race.
  • Take Up My Sword: Lapis implies they wanted to go to the moon and learn more about the Lunarians and their motives, encourages Phos to do the same, and gives Phos their head so they can better analyze and plan out their situation.
  • The Lost Lenore: For Ghost Quartz and their inner Gem, Cairngorm. Ghost blames themselves for Lapis's capture, and as a result their inclusions force Cairngorm to protect Phos so they will not be taken.
  • Mental Fusion: Possibly with Phos, as Lapis has had a very profound effect on Phos's mental state and descent into moral ambiguity. Chapter 96 confirms this to be the case, as Ghost metnions that Lapis was one of the few Gems who could not be revived as a Lunarian.
  • Off with His Head!: Only their sleeping head remains, as everything else was taken to the moon. It's later attached to Phos' own headless body.
  • Manipulative Bastard: According to Euclase, Lapis could prey upon anyone's weaknesses and knew just what to say to a person in order to get what they wanted. This rubs off on Phos as time goes on.
  • The Smart One: Comes with being the Library chief.
  • The Sociopath: Again according to Euclase, Lapis did not care about the wellbeing of others, preferring to satisfy their own curiosity and goals above all else.
  • Spirit Advisor: For Phos, once Phos gets their head.
  • Talking Is a Free Action: Subverted. Lapis admits they got captured because the Lunarians shot at them while they were having one of the internal observation monologues Phos later inherits.
  • Token Evil Teammate: Implied as Phos becomes much more morally ambiguous after gaining their head.
  • Tsurime Eyes: They have noticeably sharp eyes, giving them an arrogant look even when smiling. They hint at Lapis's darker nature.

    Red Diamond 
The first Gem Sensei encounters and raises.
  • Cheerful Child: Growing up under Sensei's tutelage, they were a very happy and satisfied Gem with a childlike personality.
  • Posthumous Character: For all intents and purposes, they are this.


In general

  • Back from the Dead: Were for the most part, if not all, revived as Lunarians as of Chapter 95.
  • The Reveal: Ruby, Sapphire, Pink Topaz, and Green Diamond are shown when Yellow Diamond reminisces about them, while (Imperial) Topaz, Blue Zoisite, and Chrysoberyl are shown in the art book.


Currently captive on the Moon.

Green Diamond

Yellow Diamond's former partner. Currently captive on the Moon.

Pink Topaz

Yellow Diamond's former partner. Currently captive on the Moon.


Yellow Diamond's former partner. Currently captive on the Moon.


Yellow Diamond's former partner. Currently captive on the Moon.

Blue Zoisite

Peridot's former partner. Currently captive on the Moon.
  • Affectionate Nickname: Is often referred to as "Bluezo" by friends.
  • Intrepid Reporter: When revived as a Lunarian, Zoisite becomes a famous reporter and one half of a reporting power couple with the Lunarian Ladra. The Party At the End as a book is Zoisite meticulously photographing the last moments of Lunarian culture.
  • Japanese Delinquents: According to their description in the official art book, they're stated to have the demeanor of one.
  • Mr. Fanservice: Zoisite gets a lot of generous spreads of what appears to be a sexual encounter with their partner Ladra, including a full nude photo of them post-coitus.


Alexandrite's former partner. Currently captive on the Moon.
  • The Smart Guy: Stated to have been like an honor student in the official art book.


Sphene's former partner. Currently captive on the Moon.
  • Nice Guy: They're stated to have been warm and caring in the official art book.

Pink Fluorite

Currently captive on the Moon.


Red Beryl's former partner. Currently captive on the Moon.

Alternative Title(s): The Lustrous, Land Of The Lustrous Phosphophyllite