Characters from Land of the Lustrous who don't fit into any one of the major three races.
For everyone else, go here.
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The First Machine
Aniki / Buubuu
The machine made by humans before Kongou. Considered his "Brother" by the Lunarians.- A.I. Is a Crapshoot: According to Barbata, the machine purposefully miscalculated the trajectory of an incoming meteorite in an attempt to rid the world of humans, as it thought that Humanity was not fit to be the apex predators. The remaining humans at the time dismantled it once they realized what happened.
- Ambiguously Evil: It attempted to destroy humanity once and while it has claimed to be content now that most of humanity is gone, it had a gleeful tone when it referred to Phos as having 'destroyed' humanity and has taken unusual interest in the new rock species. Subverted when the Machine really does turn out to be as benign as it seems after fulfilling its original purpose, and it spends the rest of its days in peace among Phos and the rocks.
- Amnesiac Resonance: It gets excited when it recognises a type of seaweed it stepped on as "chips". While it can't remember everything from its long life, it does subconsciously know the plant was the same kind of seaweed in the chips that the only human it didn't hate, Professor Ayumu, used to eat.
- Big Damn Heroes: Just when Phos resigned themselves to burning up in the dying Sun's heat, the machine decides to rush back and give the last remaining piece of Phosphophyllite crystal the love and attention they believed Phos deserved.
- The Bus Came Back: It was prominently shown to still exist and there were hints that it would play a large role in the remaining story, but the question of whether it was dismantled completely or left on the moon following the several time skips is left unanswered for some time. It finally makes its first proper appearance in the manga in Chapter 101.
- Disproportionate Retribution: Sure, Ayumu's boss was a greedy, lazy jerk, but moving him into a building in the direct path of a meteor strike is pretty brutal for revenge.
- Early-Bird Cameo: Before its first proper speaking appearance, the machine's eye shows up in the notes of Volume 10's special dossier on the humanoid species. And in Volume 12, it showed up in a brief flashback when Aechmea explained how Earth got destroyed in the first place.
- In-Series Nickname: The Rock-Forms call it "Buubuu"/"Pitapat".
- Kill All Humans: Its goal was to let humanity get destroyed by meteors. Humanity dismantled it once they realized what it was planning.
- Momma's Boy: Chapter 104 reveals it decided to Kill All Humans as revenge for a horrible boss bullying and overworking Professor Ayumu. Even its last thoughts are of it wanting to tell Ayumu about the song it just made.
- Oculothorax: All that remains of it after millennia is its robotic eye and wires it uses to walk around.
- Pals with Jesus: Its relationship with the deity Phos.
- Pet the Dog: Despite its spoilt and selfish demeanor when Buubuu pilots the ship to leave Earth they ultimately decide to go back and retrieve the last inorganic piece of Phos' body to ensure that at least some part of them survives the destruction of the Earth. This allows Phos to get their happy ending as they not only ensure the death of humanity but also get to enjoy the remainder of their days with their new rock friends.
- Psychopathic Manchild: Its behavior in chapter 104 paints him as this; he wasn't so much intending to Kill All Humans with the meteor shower as to specifically get revenge on a horrible boss that mistreated Professor Ayumu by transferring him to the location the final meteor hit. That many more humans died than his target doesn't seem to have bothered him.
- Sibling Yin-Yang: Compared to its more serious "brother", the machine speaks informally and is much more emotive. While Sensei cared for the humanoid species, resembled a human himself, and effectively became one by the end of his life thanks to the Lunarians, the machine takes on an inhuman appearance, hates humanity to the point of deliberately trying to get it killed, and is glad any traces of it are gone post- Phos' prayer. However, while Sensei was stoic and rarely showed outward emotion, the machine is far more expressive despite only being an eye, comparable to all of the humanity subspecies. Instead of taking a leadership role in its life among the childlike Rock-Forms, it would rather live as just another lifeform in the new world.
- Soft-Spoken Sadist: It seems friendly enough, but it has particular glee in its tone when it talks about how Phos 'destroyed' humanity.
The Ice Floes
Whispers heard under the ice during Winter, from human souls of dregs and sinners that inhabit the ice.
- Jerk with a Heart of Gold: They have encouraged bad behaviour from the gems, such as tempting Phos into putting their arms in the ice (and breaking them off when Phos fell in) and tempting Cairngorm to suicide, but they also showed concern for Phos when Phos began to be overwhelmed by their whispers.
- Become a Real Boy: They all remember what it was like to be human, and sometimes call upon the Lunarians in the hopes that they can be human again.
- Was Once a Man: They're what's left of humanity after their genetic data got scattered into the waters. In reality, they aren't actually human dregs; they are the scattered remains of something, but they turn out to be The First Machine. It returns to being its old self after the Earth's temperature rises.
- What Happened to the Mouse?: They can technically be considered a Human Subspecies like the three main races, but they disappear from the story long before Phos prayed humanity away. Volume 12 reveals that they are really just pieces of the First Machine, and reform into it sometime before Phos prays everyone away.
The Creator (unmarked spoilers!)
Professor Ayumu
Mother
Kongou-sensei/Adamant's creator and one of the last humans left before the meteors destroyed the Earth. She appears to Phos in one of Sensei's memories, similarly to how Lapis appeared through their head's inclusions.- Body Horror: In Phos' flashback she is clearly falling apart, with flesh missing from her face, a pearl eye, a huge hole in her chest revealing her ribcage, and wiring and tubing within her body. She can also extract and drink her own blood.
- Dreaming of Things to Come: Just before she died she described a dream she had to Adamant about herself becoming a weak but important gemlike person, and she accurately says the world will be one for inorganic lifeforms that would, from the beginning, be treated as "servants", foreshadowing that the Lustrous would be used and destroyed by the Lunarians to cause Sensei to react and that Phos would be made into a prayer machine.
- Hiding Behind Your Bangs: Her hair covers half her face, hiding her more injured left half and her pearl eye.
- Mad Scientist: To a degree, given the state of her body and that she brought it to the state it was in.
- Misanthrope Supreme: By the end of her life she came to be disgusted by humanity, describing humans as a weak species that don't help each other.
- Parents as People:
- As Sensei's self-proclaimed mother, she qualifies, working through her last days to make him a beautiful vessel and claiming she was proud of him, while also lamenting that she failed to be properly able to give Adamant true freedom from his task as a prayer vessel for the last of humanity.
- She saved her first "child" by carving him out of his box body and smuggling him out in her coffee cup despite him having wiped out a great deal of humanity.
- Stealing the Credit: Her boss decided to take credit for her research on artificial life and creating the First Machine.
- Token Human: She is the only pure human that ever shows up in the story.
- Unwitting Instigator of Doom: She was the one who prevented Sensei from carrying out his prayer task, deliberately programming it into him. While this was likely done benevolently to ensure Sensei would be able to participate in this world, this meant that the Lunarians were unable to pass on, leading them to attack the Lustrous in an attempt to force Sensei to pray for them. As Sensei's Brother notes in the final volume, she's also indirectly responsible for the apocalypse, as the only reason why Earth was unprepared for the final meteor strike was because the machine purposefully miscalculated information and was specifically trying to kill her jerky boss.
The New Lifeforms (unmarked spoilers)
The Rock-Forms
A "new" non-humanoid species that emerged somewhere in between the story and the millions of years Phosphophyllite hibernated. They resemble small rocks.- A Dog Named "Dog": While most of the rocks have nonsensical names or simple syllables, the first Rock-Form that Phos meets is eventually revealed to be named "Pebble".
- Beautiful Singing Voice: Pebble seems to enjoy singing more than anything, as most of the time it spends with Phos is spent on it singing nonsense songs that Phos greatly enjoys. When Phos deciphers another rock's written poem, this rock sings it out to the point where Phos slowly melts.
- I Am What I Am: Contrast to virtually every other character, Pebble is completely satisfied the way it is and rejects Phos' offers to turn it into something more humanoid. It doesn't mind not moving, not having eyes, or not having a human body; it can listen to the stars, see the aura of other living things, and prefers to stay right where it is.
- Immortal Immaturity: Of all the long-lived species, the Rock-Forms are easily the most childish. Even after thousands of years, they have vocabulary barely above an elementary schooler's, they're fairly innocent and naive, and they treat humans akin to monsters under the bed when they go to sleep.
- Innocent Means Naïve: The reason why the rocks are all so pure is because they didn't have the chance to get into contact with their much more flawed predecessors. At best, they're ignorant of Humanity and the Lunarians, with everything they know about them told by Phos and the Machine. This is considered a good thing, as without humanity's ills they're content to play around and befriend each other.
- It Was There the Whole Time: The lifeforms were apparently there the entire story, but no one could converse with them until Phos managed it after millions of years. One particular rock, the smallest of them all, turns out to be Lost Technology older than the rest and was present for all of the last days of human history.
- Mellow Fellow: In the few moments we get to know it, the first Rock-Form explains that it is perfectly content the way it is and simply wanted to talk to somebody. Even encountering someone it couldn't talk to for millions of years doesn't stop it from being polite and cheerful.
- Pals with Jesus: Almost immediately after becoming a deity Phos meets and befriends Pebble who desires nothing more than companionship. As Phos travels the human free Earth they encounter more rock-based lifeforms who also become their friends which helps heal their fractured heart and allows them to live in contentment for the remainder of their days before the destruction of Earth.
- Restored My Faith in Humanity: Well not humanity so much but other lifeforms. After being consistently betrayed and manipulated and suffering from the mother of all Trauma Conga Lines Phos became largely despondent and rescinded to their role as the new Sensei. The simple friendship of the rock lifeforms, who desire nothing more than to exist with them, allows Phos to regain some of their joy and allows them to live in contentment for the remainder of their days. Before they send the rocks away from Earth Phos makes sure to thank them for all they've done for them since their ascension.
- Silicon-Based Life: They are fully sentient mineral creatures like the Lustrous, but whereas the Lustrous still had traces of human in their bodies, these lifeforms are fully rock.
- Starfish Aliens: The most abnormal of all of the species shown thus far, the Rock-Forms have no notable features and do not need to eat, sleep, or see. They can still talk, but at a frequency at which no one else could hear them.
- Superior Successor: Not only to the Lustrous, but to the three races. The rocks may not have humanoid bodies or have abstract goals, but they are satisfied with what they are, treat each of their members equally, and lack humanity's emotional flaws. It is telling that they are the ones who go to the idyllic paradise planet, while the rest are stuck in another universal cycle.
