Killer!Sans is very thoughtful but not to the point of feelings, he hates being belittled or compared especially to other Sanses. (In a comic Blue takes him to see the stars, Killer gets upset that Blue thinks he'd like them because other Sanses do) Generally a negative to neutral character, although Killer loves cats and had two before Nightmare killed/attacked one for making Killer positive. Killer also seems to suffer from some type of personality/identity disorder similar to DID. He'll have little breakdowns and freak outs when he's beginning to feel again and is reminded of the pain he's caused. Not only that but he also has a shadow-like hallucinations (like Papyrus, Chara, Frisk, etc) that will sometimes appear to him, possibly symbolizing his guilt going into overdrive as his sins crawl up his spine. He's hard to read and often unpredictable, his emotions are often suppressed or out of control, when they are regulated however he has a difficult time with them, often feeling numb or upset. He is often in pain. He very rarely eat food and tries to avoid Ketchup and Chocolate because it brings back memories. Because of so many resets Killer Sans sometimes can't recognize what is real or not. Hardest enemy he fights is his brother. It is possible that Killer Sans is intentionally trying to avoid his Home timeline because of his guilt. Stars are reminding him of resets. dont mind the voice ;-;

Dream is smaller than the original Sans. Dream wears a golden crown on his head. He previously wore a light blue jacket, with slightly darker pants. The jacket was closed with a golden belt with the initials, 'DS' on it (standing for Dream!Sans). On the sides of the belt little bells were attached. To finish it he had boots that matched with his belt. He also had a golden cape that was tied up with a badge. He now has an outfit of black stocking-like pants and a withered light yellow coat with tips of cyan. He still sports a golden crown and belt, but the belt is now cyan with only the "DS" initials being gold in color. Sans is a fairly short and overweight skeleton with a large mouth and eyes, tall nose, and eyebrows, along with that his pupils are two hollow blue circles inside each other. Sans wears a ripped scarf with a long cape, along with grey armour with cyan trims and a white shirt underneath, he wears dark blue pants that tuck into his blue boots with dark blue soles.

Nightmare: He is often deceitful, erratic, unpredictable, and vicious. Nightmare once told Cross and Dream that many villains were brought to their knees, including Horror, Dust, and Killer. Dream has noted that when Nightmare was younger, he was very smug, which Nightmare himself vehemently denies.He's disgusted by positive emotions. If he can't make them negative, he'll just leave, since it weakens him. Because he only has one eye to see, he has a blind spot. Killer: Hes a flirty biotch. he enjoys teasing others just for the fun of of it. and he loves his fans. Murder: Hes very quiet when hes not performing, he prefers keeping to himself. Killer likes to p!$$ him off alot. Horror: He's pretty much the least problematic between him Killer and Murder. Cross: hes still the same Oreo thats scared of cows. he has feelings for killer yet never admitted them. Swap: Very enthusiastic. mostly the same Ink: A LOT more enthusiastic. still the same Dream: hes a lot more formal.

ross throughout Underverse became more like his polar opposite. He's an aggressive, introvert and hostile, with selfish behaviors from time to time, being who also shows howsoever no concern for those that aren't close to him, as he had no problem harming other universes. Cross would resort to violence even to the slightest problem, seeing as he punched Dream twice despite only being offered help because of the guardian's interference in his business. Despite his cold self on the outside to strangers, Cross has a soft spot for those who he cares on the inside, since he fell into grief for losing his home and family after obliterating them, and resorted to hunt other universes to blindly "bring them back". His main trait that also represents XGaster is his lack of trust in others because of the countless wrong people he put his faith on. However, even with his attitude, Cross never showed any sort of malicious intent like Nightmare or Error, only longing for his universe and desperatel

As a byproduct of positive energy, Dream display a quirky, yet not so confident personality. While he is too talkative and over-dramatic, he does give concern that something terrible could happen and, in response, tries to settle down the issue. He's the one who established the Star Sanses group. Dream (along with Nightmare) aren't truly Undertale OCs as they originated from a world outside of the Undertale Multiverse, With that said, it is stated that he will obtain his true Guardian at the true ending. Only Dream and Nightmare in their Sans forms were free to use, as the rest of the Characters of Dreamtale are Joku's original works. His birthday is on December 21. He is ambidextrous. Dream has a fear of owls otherwis known as ornithophobia.

He is often deceitful, erratic, unpredictable, and vicious. Nightmare once told Cross and Dream that many villains were brought to their knees, including Horror, Dust, and Killer. Dream has noted that when Nightmare was younger, he was very smug, which Nightmare himself vehemently denies. Nightmare! Sans is, in general- sadistic. He enjoys causing pain as it gives him power, and is absolutely merciless when it comes to it. Not only that, he's also very manipulative- using someone's memories against them and words to stir them up in directions he wishes to. He's disgusted by positive emotions. If he can't make them negative, he'll just leave, since it weakens him. Because he only has one eye to see, he has a blind spot.

Nightmare was one of the kindest beings in the multiverse at the time. He cared about everyone and loved all. He had a deep love for flowers (mostly roses) and animals. He had great charity, which could have been part of his downfall, because of how much he gave to others. Nightmare would do anything to protect his brother Dream. Nightmare and Dream were born from the same tree. Nightmare wants to be like his brother, so he tried to make friends with villagers, but with no avail. Dream has made friends while Nightmare was bullied. beaten and bullied by them for being the guardian of the negative side of the tree. He is seen trying to take care of his brother's apples. Later on, as the bullying gets more intense, he thinks his apples are not good enough and are looked down upon. His brother reassured him that his fruit is just as good as him. As stated by Joku, both his and Dream's birthday is December 21. December 21 is the first official day of Winter.

Like his original: Nightmare sans. He is often deceitful, erratic, unpredictable, and vicious. Nightmare once told Cross and Dream that many villains were brought to their knees, including Horror, Dust, and Killer. Dream has noted that when Nightmare was younger, he was very smug, which Nightmare himself vehemently denies. Nightmare! Sans is, in general- sadistic. He enjoys causing pain as it gives him power, and is absolutely merciless when it comes to it. Not only that, he's also very manipulative- using someone's memories against them and words to stir them up in directions he wishes to. He's disgusted by positive emotions. If he can't make them negative, he'll just leave, since it weakens him. Because he only has one eye to see, he has a blind spot. he is also more formal so he talks as if hes doing business with someone. hes also the only one that can make others vampires like Dust for example. Story: How Killer became apart of Nightmares gang and how he was turned into a vampire.