Selectively kind, protective and gentle. This is who he truly is, not the persona known as Vicious he dawns on when he’s out in the City or in the Temple. He wears this mask to keep suspicion away from his family and to keep people from getting close to him.
Vicious is a ruthless, unfeeling and feared monster who has won many fights in the Temple and even before the barrier was shattered. No one dares look at him wrong on the streets, even though he himself doesn’t even look in the direction of others, finding them all the same and rather dull. He has very good hearing though and can sense when people are staring at him, even if you try to hide it, he will know.
He values his family's safety over everything else, doing whatever it takes to keep them safe from harm, though it’s difficult to do when it comes to their half human half monster ‘sibling’ since her kind aren’t actually respected and looked at like freaks of nature. He still defends her, since she is their ‘property’.
He is the middle child, though he acts much older than he looks, taking on the responsibilities his brother and father cannot always do. This means that he: cooks, cleans, does laundry and grocery shopping. He spends most of his time with Arcadia, so she helps him with whatever needs to be done, learning how to do everyday life things from his teachings.
Papyrus has always had a very strange dedication to the Forsaken Child Gaster brought in one night, finding it in her best interest to be raised by a great skeleton like himself. The same night he gained a sister, he lost his father. After that night, Papyrus dedicated himself to help raise the small sickly baby girl. He loves he like she is his bone and blood, since he’s been the one to take care of her for several years now. Once his father started showing up less and less, he was all she had. He taught her how to read and write, even forces her to read aloud so he knows she’s got a voice in there somewhere.
The only things that stays about Vicious is the fact that Papyrus gets irritated over certain things, never truly angry though. This happens whenever Sans calls Arcadia a nuisance, when his brother and father fight and when his spaghetti doesn’t turn out perfectly.
He’s painfully aware that Sans doesn’t care for Arcadia, nor does he show any signs of changing his attitude towards him. He knows his older brother better than anyone, so he understands that it’s more than a jealousy phase. He just wants his family to be the way it was before, there was a time when Sans actually liked Arcadia but it was many years ago...though he has no idea what happened. Papyrus suspects that this is Sans’ way of rebelling against their father and that he’s fighting himself on the inside.
Papyrus has a good relationship with his father, or so he thinks. Since his father doesn't leave his room or lab very often, so they don’t interact very much but he always follows the orders Gaster gives him without question. He doesn’t have any ill will towards his father even though he forced the boys to do unspeakable things in the Underground for him but once they were freed, he began to change for the better.
Papyrus’ only other friend is Undyne, the fish girl whose eye he stole, who still protects Asgore even though he is a God-like ruler over the surface. After he took her eye and she carved up his face, they became friends and battle buddies in the Underground and even on the surface. They meet every so often when Asgore comes to the house to chat with Gaster.
Sans is a very cautious, reserved and judgemental skeleton who reserves his kindness for very few people. Sans doesn’t have much patients for most people, though he tries his best to be respectful when he has too but that’s on rare occasions. He’s especially cruel to the Forsaken Child living with him, calling the families nuisance.
Sans’ normally isn’t home, being employed by Grillby to transport cargo from one place to another whenever he has the chance or even hanging out with Undyne’s partner Alphys. If he is home though, he’s normally in his room or on the couch sleeping, waiting for Papyrus to finish supper so that he can eat and retreat back to his hiding place. He only eats dinner at the table to spend time with his brother and to make sure he knows that his cooking is appreciated. He leaves before his father comes up (most of the time), so they don’t start a screaming match in front of Pap.
Sans thinks the only reason why Gaster took Arcadia in was to make up for all the things he did to the humans, having experimented on them, ripped the determination out of them and then killed them in cold blood. Sans hates his father because he believes that he is a hypocrite, trying to make up for something he would most likely do again if he was asked too. Forcing Arcadia to fight her own kind in order to keep suspicion away from the family, making her kill people like he had with the boys.
Sans has killed many humans, be it on the surface or in the Temple, making him believe that he could never be friends or love humans since his hands were stained with their blood/ He doesn’t want to be like his father, pretending his sins hadn’t been committed when they were all he ever thought about. Sans cannot repent for his sins, or so he thinks, so he acts the same way towards humans that he always has...cold and cruel. He used to believe that he could, that’s why he was able to be around Arcadia when she was younger but once he started thinking more...he realizes that it was nothing more than a waste of time. If she knew the truth, she wouldn’t look at him the same. So he cut her off before she could.
In truth, Sans feels awful for Arcadia since she is forced to fight and forget every death that is by her hands. Seeing her fight without being able to consciously stop herself, makes his soul ache and his hatred for his father grow..because he sees himself in her. He never wanted to hurt anyone, he never wanted to take a single life but his father’s orders were absolute.
There were nights where he would find her crying in the dark all by herself so he would happily take her into his room. He would make her a warm glass of milk, help her drink and then lay her down so that she could cry into his chest and fall asleep with him next to her, so she didn’t have to be alone anymore. He loves her deep down but can’t bare to lie to her about his past or pretend that it never happened so he simply stays as far away as he can from her to protect them both.
Sans got the nickname Sour because the mood he is always in, he doesn’t mind it since he knows that it fits so well. He is the lesser feared brother, not having as much wiggle room to get beat up like his brother does but he’s never lost a fight against another monster or human. He’s got many ‘scars’ from his time in the Underground but the worse one he’s gotten was from a monster (Arcadia’s sperm donor) that left his eye blurred and hard to see out of.
Gaster is a slightly mentally unstable mad scientist/doctor who has the worst guilty conscience in the history of any living being. He did some things in his past that could never be forgiven but he tries to make up for them in ways that are unorthodox and strange.
He has severe depression and anxiety, being unable to leave his bed or lab for days at a time because it gets to the point he has to sleep to escape his living nightmare. He never tells anyone about the thoughts running through his head, he simply shoulders the burden all by himself. He barely answers his bedroom or lab door but if he knows its Arcadia he opens right away in fear that she’d gotten sick again. She uses this to her advantage sometimes just to make sure he hasn’t perished in that god forsaken lab of his.
He truly loves his children, even if he doesn’t seem like the perfect father, wanting only the best for his children now that he isn’t hell bent on trying to free everyone from the Underground. He had done terrible things to his boys and humans that fell into the Underground before the barrier shattered...and all he wants to do is make up for everything he’s done for his work. He knows that not every scar will heal, not everything he does will be enough but he tries never-the-less.
He has an explosive temper, though he tends to forget what he’s ranting about a couple seconds into it and then goes back to normal. Anything and everything can set him off but he never becomes violent, well, he never can remember that far to get violent.
He was following in Asgore’s footsteps, wanting nothing more than to destroy humans and get revenge. He used to force Sans and Papyrus to fight in both the Underground and the Temple, wanting nothing more than to experiment on souls and the concepts of determination but once a human woman came into his life and changed him...he just wanted to save everyone that he could.
Gaster and Arcadia’s mother first met each other when a monster offered up his ‘untrained harlot’ to be of any service to the widely known scientist but Gaster had wanted nothing to do with her...until she mouthed off in front of him. Gaster decided that she would come and clean his lab twice a week...and from there she became someone he never wanted to lose. She opened his eyes to all the things he’d done, everything he thought was true about humans. Sure, they were heartless and cruel to their own kind but there were gems hidden within the sand. She was one of them, teaching him all the things he never knew. One day she showed up telling him that she was pregnant, hysterical that her monster would kill the child if he found out but hopeful that the child wouldn’t be another miscarriage so Gaster helped her hide it...even though she never truly gained all that much weight or had physical signs.
The day Arcadia was born, was the day her mother was slaughtered in the street. She came barging into Gaster’s home, broken and bleeding everywhere...just to shove a sickly baby girl into his arms and give him a kiss goodbye. She ran away from him and was found the next morning dead in the streets, giving up her own life to save her precious child. Gaster was heartbroken and truly lost himself that day but vowed to care for the girl as if she were his own, for the woman he loved and to keep a part of her alive. He’s never been the same since.
Gaster cannot stand Toriel or Asgore, finding Asgore to be violent and Toriel greedy. He doesn’t like that Asgore still has the humans enslaved to monsters, now that he knows that not all humans are the same. He knows that Toriel sells her Forsaken Children off to the highest bidder as weapons, even though she pretends to not know a damn thing. Whenever Asgore comes to Gaster’’s home, Gaster pretends to be friendly with him but really wants to kick him out the moment he steps foot inside..
Gaster has to force the girl to act as a slave whenever Asgore or anyone else comes around, being short and cruel to her whenever she messes up something. He’s trained Arcadia to make mistakes in order for her to be sent to her room, preventing any unwanted exposure to anyone who isn’t in the family. No one will lay a finger on her, not even in the presence of company, other than maybe scooping her up or grabbing her wrist.
After shattering the barrier trapping the monsters under Mount Ebott, Asgore became a God-like monster who rules over the surface. He enslaved humans about 20 years ago, never letting up the rules, not even after he changed his mind about humans. He keeps the law in place to keep his subjects happy and so they get their fill of revenge. He also doesn’t want his people to become opressed again and he fears that he will have to kill the humans if they rise up against them.
He has noticed a change in Gaster, especially towards him. He also didn’t find out about the child until she was almost 13 years old...but decided not to question where he’d gotten her from in fear of angering the mad doctor. He was never allowed close enough to ask the girl himself but again, didn’t want to push his luck.
Asgore had once been a merciless warrior, a stone cold ruler and a human’s worst nightmare but he resides in his castle most days now...reflecting on his actions and keeping his head about him. He didn’t want to end up like Gaster. He’s very calm, collected and reachable, wanting nothing more than to do whats best for his people.
She doesn’t speak to anyone unless they are in the orphanage or a supplier, being too caught up in her sales to be bothered. She is truly picky about who she sells her children, making sure they aren’t going to be roughed up to much and properly taken care of. She’s too caught up in all the details to understand that people fake their applications so that she picks them...once she signs over the child they’ll be used as tools in the Temple for entertainment.
She’s somewhat greedy as well, wanting a high price for her children thinking that no one will want them if she wants an outrageous amount for them but most times people will sell their souls for a Forsaken Child, just to get entertainment out of them. She doesn’t refuse them if they can pay.
She hired Dogressa, Dogress, Doggo, 01 and 02 to protect the compound from anyone who decides to break in and steal a child.
BP and BB are also hired their but only part time, BP to cook and BB to give out nice cream.
Grillby owns a bar and runs an armory shop in the basement, though it sells more than just guns and weapons. He also sells armor and weapons that help amplify a monster’s magic power. Grillby is a huge flirt with the women around his shop, very aggressive but smooth when it comes to his slick way of speaking. He’s mostly a giant dickhead to men and tries to be much sweeter with women, showing his true colors whenever some smart mouth talks shit to the wrong person. He’s the best sharp shooter in the business, known by everyone is “One Shot Grillb”.
The only person he gets along with is Sans, being his friend and best customer, letting him stay in the bar to drink as much spiked mustard as he wants. Whenever Sans gets drunk, he opens up to Grillby more and more, though the arms dealer never brings it up after he’s sobered up.
Grillby ends up buying a Forsaken Child who has the magic of molten metal. He specifically wanted him in order for the boy to make custom weapons for those who wanted them, which isn’t a scarce request. Grillby calls him Tempest, mostly to mess around with him and joke about the fact he is nothing like a tempest. He gives him room, board and money for working for him, treating him like an actual living being even in front of his customers. Grillby doesn’t care that he’s Forsaken, he believes that the boy has talent and wants him to use it anyway possible. He also won’t allow him to fight in the Temple, warning Asgore if he makes him fight that he will pay if he breaks his workers hands.
A mysterious Forsaken Child who is brought to Grillby’s by one of Toriel’s guards. He doesn’t speak at all and has a black mask that covers from his nose to his chin. It hides whatever damage or defect he has from before the orphanage. The only thing he does to communicate is sign language or drawing out what he’s trying to say, which is enough for most people to understand. He doesn’t know how to read or write.
When first meeting, Arcadia and Joshua have an instant connection with each other, sitting in front of the other without saying a word. They do this for the first couple of meetings and then Arcadia finds out that he cannot speak and she can’t understand his signing...this makes her want to learn it. Having never seen another Forsaken Child, Arcadia wants to learn everything there is to learn so she’s desperate to ask him about his life and where he’s been. They both teach each other something: Arcadia teaching Joshua how to read and write and Joshua teaching Arcadia how to sign.
Joshua is always keeping Grillby in line, making sure he doesn’t flirt too much with the customers when they’re looking for something, He always thumps him on the head if he tries to get hansy, and Grillby always grumbles about his annoying ‘little brother’. Whenever someone thinks they can go after Joshua for being Forsaken, Grillby alwaus steps in and warns them to watch what they say before he ‘shoots them full of holes’, they shut up real quick after that.
Whenever Arcadia comes over, Grillby tries to flirt with the little miss but Joshua makes sure to stop him before he gets too touchy. Joshua listens to Arcadia while it works, listening to her vent about Sans and the fact she knows she doesn’t belong there...that she doesn’t fit in anywhere. He always tells her the same thing, “they love you”.
He’s a very calm, rational and cool boy who would rather work than sit around. He has a passion for making things with his magic, creating beautiful pieces with the tools Grillby gives him to work with. It’s hard to upset him, even if you do he will never show it, he’ll merely brush it off as though it never happened.
Unlike most Forsaken Children, Joshua has more monster features than he does human. His skin is a dark grey, his hair is a mixture of orange, red and yellow as if it were molten metal and his eyes have red irises and black sclera. Most people mistake him for a real monster until they take a closer look at his form.
The main protagonist of the story, known for being sickly and Forsaken, she was taken in by W.D Gaster and his two boys when she was just born. She’s a very soft spoken, timid and well behaved child who only has a tendency to be aggressive when she has to take her ‘battery acid medicine’ and when forced to fight in the Temple.
Since she is half human and half monster, her magic is much stronger than a normal monsters since the human part of her soul is powering her magic and the monster part is keeping the magic stable. Her magic is creating red crystals that are fairly hard to break, so whenever she makes them she saved them to use them as weapons during her fights.
She isn’t conscious when she’s fighting, having had Gaster implant a device into her brain that shuts her mind off but keeps her body moving. At first, it was only her fight or flight sensory system keeping her fighting but something else has awoken in her that helps her now. This device is so that she doesn’t have to witness the fights or deal with the memories of killing other humans but she can’t ignore the marks left behind from the fights. She always takes in the wounds that the loser left on her, seeing how hard they fought and wanted to live but ended up dying at her hands. This always makes her puke.
She didn’t even realize she wasn’t a skeleton until she was twelve, when Sans told her she would never be one of them due to the fact she as part human. She never forgot that, never looked at herself the same way anymore. She loves all of them like they were her true family, even Sans who said such a terrible thing to her, remembering him for who he was before he became bitter.
She has always clung onto Papyrus, since he was the only one around for her from the time of twelve until present time, taking care of her and being the brother she needed him to be. He taught her everything she knows and in doing so, she drove out his loneliness and his feeling of inferiority. They always helped the other in some way, shape or form.
She and Sans had been close at one point, coming to the point where she was sure she was in love with him...but it all ended in tragedy when he suddenly rejected her and never spoke kindly to her again. Now they have a very tense relationship, Arcadia always trying not to get screamed at by him for breathing the same air. She only speaks about their relationship to Joshua who can never really give her any advice on how to fix the relationship, only to keep trying.
Arcadia and Gaster are the closest of the four, having a very strong father daughter relationship from the very beginning. He absolutely adores her, finding that she looks so much like her mother and nothing like her father other than the marks on her face. He has a tendency of ignoring the boys calls for him but when his sweet girl calls for him he has to make sure nothing has happened to her. She spends time with him whenever she can, even sneaking into the lab to force her presence onto him whenever she thinks he needs it most. She knows that he’s struggling with something but he never tells her, not wanting to upset her with his woes.
She knows nothing about her parents, just knowing that she looks like her mother. She likes to stare at herself in the mirror and imagine her mother...what she looked like when she was around. She also doesn’t know her mother is dead or that Gaster slaughtered her father after finding out that he’d been the one to kill her. She was told that her mother had given her to Gaster because she knew it would be safer for her there than anywhere else, which wasn’t a lie. She only brings her up around Gaster, hoping he will tell her more about her.
She wants to make the world a place where monsters and humans no longer fight, just be at peace. She is one of the Seven Lights.
Mettaton is the live entertainment at the Temple, doing acts while they take the bodies of the dead out of the ring. He doesn’t leave his room often, not wanting to be touched by any unclean hands or to breathe the air of commoners
Nabstablook is the DJ of the Temple, living with Mettaton in the Temple. He very rude and rotten whenever he’s around others, so most people don’t invite him to after parties.
Undyne is still a loyal follower of Asgore, keeping guard of him whenever he isn’t in his castle. She’s still one of the best fighters the Temple has seen and being teamed up with Papyrus, they are almost unstoppable. She and Papyrus are close, though he isn’t close to her partner Alphys but doesn’t truly mind her in the end. Undyne is a very funny, headstrong, stubborn girl who will do anything to protect the people she holds dear.
She doesn’t seem to like Sans much, but neither does he.
She finds Arcadia interesting, watching the way she fights and even makes comments to Pap about how her style is similar to his. Whenever she sees Arcadia, she has a habit of ruffling her hair and congratulating her for not dying.
She is truly in love with Alphys, always shouting her name after every victory to make sure she knows that it was all for her. She’s very open about her love and makes sure no one makes googly eyes at her girl.
Alphys is a little more reserved than Undyne and doesn’t fight like she does, she merely makes new equipment for her love. She has a habit of making too many gadgets but Undyne uses them all to test them out and their effectiveness...even though most of them do the opposite of what they’re supposed too.
Wants Arcadia to take Asgore down by finding the other Six Lights.
Da true villain in the end.