Undertale au Christmas Party

Science Sans (SciSans)
Appearance:
Usually wears a lab coat over his clothes, but in the Christmas image he is wearing a festive sweater (sometimes still with goggles or a scientific look). He has a cleaner, more intellectual appearance than Classic Sans.
Personality:
Curious, intelligent, and a bit socially awkward. He loves science, experiments, and learning how things work. He is friendlier and more open than Classic Sans, though still sarcastic.
Powers:

1. Gaster Blasters – Uses advanced or experimental versions of blasters.
2. Scientific Knowledge – Can create gadgets, machines, or temporary inventions in battle.
3. Blue Magic – Standard soul control, often used more creatively.

Reaper Sans
Appearance:
A darker, more elegant skeleton, often with a black hooded coat or cloak. In the Christmas image he wears a dark holiday sweater while still keeping a mysterious presence. His eyes are usually glowing a soft white or pale color.
Personality:
Calm, quiet, and serious. Reaper is detached from most emotions because of his role as a being connected to death. He is polite but distant, and rarely gets truly involved unless necessary.
Powers:

1. Death Manipulation – Can interact with souls and the concept of death.
2. Scythe Combat – Wields a powerful scythe as his main weapon.
3. Soul Reaping – Able to separate or collect souls under certain conditions.

Underswap Papyrus
Appearance:
Taller than most Sanses, with a more relaxed and cooler design than Classic Papyrus. In the Christmas image he wears a warm-colored sweater and has a calmer posture. He looks more like the “lazy brother” compared to Classic Papyrus.
Personality:
Calm, cool, and a bit lazy (the opposite of Classic Papyrus). He is still caring and protective, but much more laid-back and less dramatic. He often acts as the more tired or chill older-brother type.
Powers:

1. Blue Magic – Can turn souls blue and control movement.
2. Bone Attacks – Uses bones in a more relaxed but still effective way.
3. High Defense – Generally tougher and harder to wear down.

Cross Papyrus (X-Tale Papyrus)
Appearance:
A tall skeleton with a more serious and battle-worn look. In the Christmas image he wears a white or dark holiday sweater with subtle X-related details. His design often includes scarf elements or a more military-like presence.
Personality:
Loyal, serious, and protective. He is more mature and grounded than most Papyrus versions. He cares deeply about Cross and tries to keep him stable, acting as a strong moral support.
Powers:

1. Advanced Bone Magic – Strong and precise bone attacks.
2. Combat Experience – Highly skilled fighter due to the events of X-Tale.
3. Support Abilities – Can fight effectively alongside Cross and cover his weaknesses.

Geno Sans
Appearance:
Geno has a damaged, cracked skull with a large hole in his head and a bleeding effect around it. His body looks unstable and partially broken. In the Christmas image he wears a dark or blood-stained holiday sweater, still showing signs of his injuries.
Personality:
Quiet, depressed, and filled with guilt. Geno is the version of Sans after a failed reset or severe trauma (from Aftertale). He is tired of everything, emotionally numb, and carries deep sadness, though he can still show dry sarcasm.
Powers:

1. Determination Control – He has a high amount of determination that keeps him alive despite fatal injuries.
2. Bone & Blaster Attacks – Uses classic Sans attacks, often stronger due to his determination.
3. Reality Anchoring – His determination allows him to resist being erased or reset easily.

Epic Sans
Appearance:
Epic Sans has a cooler, more confident design with white bones and a stylish look. In the image he is wearing a festive sweater and usually keeps a confident grin. He often wears sunglasses or has a more “awesome” posture.
Personality:
Laid-back, confident, and tries very hard to look cool. He is friendly and chill, but also a bit of a try-hard when it comes to being “epic.” He enjoys jokes and usually doesn’t take things too seriously.
Powers:

1. Epic Bones – Can summon bones with extra style and power.
2. Shortcuts – Uses teleportation in a flashier way than Classic Sans.
3. Blaster Summoning – Calls Gaster Blasters with dramatic flair.

the party is located at the void. a white infinite place where no one can be hurted or killed. there’s a long table that has chairs in it and there’s a eggnog that has vodka in it but no one knows who did it and if there is vodka in it and it can make people drunk very easily and think silly stuff. there is a blue door that isn’t conectes to anything but if opened there’s a dark room a black neon room.

Underswap Sans (Blueberry)
Appearance:
He has a brighter, more energetic look than Classic Sans. In the picture he wears an orange or light blue festive sweater.
Personality:
Blueberry is friendly, optimistic, and energetic. He acts more like classic Papyrus — enthusiastic, kind, and eager to make friends. He is less lazy and more openly emotional.
Powers:

1. Blue Magic – Can turn objects and people blue to control their movement.
2. Bone Attacks – Uses bones in a more active and creative way than Classic Sans.
3. High Stamina – More energetic and active in battle compared to Classic Sans.

Underfell Sans
Appearance:
Underfell Sans has sharper features, red accents, and a tougher appearance. In the image he wears a red-accented Christmas sweater.
Personality:
He is meaner, more defensive, and less trusting than Classic Sans. He acts tough and aggressive on the outside but still has a hidden soft side for those he cares about.
Powers:

1. Stronger Bone Attacks – More powerful and sharper versions of classic attacks.
2. Red Magic Influence – Attacks carry a more aggressive and damaging edge.
3. Higher Combat Aggression – Fights more directly and fiercely than Classic Sans.

Classic Sans
Appearance:
The original Sans. In this image he wears a simple white or lightly patterned Christmas sweater and keeps his classic lazy grin.
Personality:
Lazy, sarcastic, and laid-back on the surface. Deep down he is highly intelligent, depressed, and deeply protective of his brother and friends. He notices more than he lets on.
Powers:

1. Blue Magic & Karma (KR) – Can turn souls blue and deal damage based on the opponent’s sins.
2. Gaster Blasters & Bones – Summons powerful skull-shaped blasters and bone attacks.
3. Shortcuts – Can teleport short distances through unknown means.

Killer Sans
Appearance:
Killer has a darker appearance with a wide, unhinged grin and target-like eyes. In the picture he wears dark Christmas clothing.
Personality:
Killer is emotionally empty, apathetic, and sadistic. He feels very little and mostly finds purpose in killing. He is loyal to Nightmare and rarely shows genuine emotion.
Powers:

1. High Determination – Gives him increased strength, speed, and durability.
2. Dust Attacks – He can manipulate dust and use bone attacks enhanced by his high LV.
3. Combat Instinct – Extremely skilled and ruthless in close combat.

Horror Sans
Appearance:
Horror is bulkier than most Sanses, with a more damaged and uneven look. He wears a Christmas sweater in the image and usually has one glowing red eye.
Personality:
Horror is traumatized, unstable, and aggressive. Long periods of starvation and violence in his AU left him deeply scarred. He can switch between quiet and extremely violent depending on his state of mind.
Powers:

1. Enhanced Strength – Far stronger physically than most other Sanses.
2. High Endurance – Can survive extreme injuries and keep fighting.
3. Brutal Combat Style – Relies on raw power and overwhelming force.

Dust Sans
Appearance:
Dust usually appears darker and more worn down, sometimes with a hood. In this image he is wearing a dark Christmas sweater and has a tired or manic expression.
Personality:
Dust is broken, ruthless, and haunted by the genocide he committed in his own timeline. He carries deep guilt mixed with cold determination. He is quiet but extremely dangerous.
Powers:

1. Extremely High LV – Makes his attacks much stronger and more lethal.
2. Advanced Bone & Blaster Attacks – More powerful versions of classic Sans attacks.
3. Genocide Experience – Highly experienced in killing and fighting other monsters.

Nightmare Sans
Appearance:
Nightmare has a dark, melting body made of black-blue goop that constantly drips. He has one glowing cyan eye and a wide permanent grin. Large black tentacles emerge from his back. In the image he is wearing a dark holiday outfit.
Personality:
Nightmare is cold, sadistic, and highly manipulative. He feeds on negativity and enjoys spreading fear, despair, and suffering. He is calm and arrogant most of the time, but becomes much more vicious and unstable when surrounded by strong negative emotions.
Powers:

1. Negativity Absorption – He grows stronger by feeding on negative emotions.
2. Goop Tentacles – He can create and control multiple powerful black tentacles to grab, stab, or crush opponents.
3. High Regeneration & Resistance – His goop body absorbs most attacks and allows him to regenerate quickly.

Cross Sans
Appearance:
Cross is a white skeleton usually marked with black X patterns. In this image he wears a white Christmas sweater with subtle X details and has a serious expression.
Personality:
Cross is conflicted, loyal, and emotionally heavy. He constantly struggles with guilt and his darker side. He tries to do the right thing but often feels torn between different identities and past actions.
Powers:

1. Determination – He possesses strong determination that boosts his endurance and attacks.
2. Knife Mastery – He is highly skilled with his knife and can use it with great speed and precision.
3. Code & Overwrite Influence – He has residual abilities related to code manipulation from his AU.

W.D. Gaster
Appearance:
A dark, mysterious skeleton figure with a cracked skull. In the group image he appears as one of the more shadowy or uniquely designed characters in the back, wearing a dark or muted Christmas sweater. His body often looks slightly distorted or void-like compared to the others.
Personality:
Cold, calculating, and highly intelligent. Gaster is distant and hard to read. He speaks in a fragmented or cryptic way and carries an air of someone who knows far more than he should. He can be detached, scientific, and morally gray.
Powers:

1. Void Manipulation – Can interact with and move through the void between realities.
2. Determination & Code Knowledge – Deep understanding of the game’s code and determination, allowing reality-warping abilities.
3. Gaster Blasters (Original) – The true creator of the blasters; can summon extremely powerful versions of them and other experimental weapons.

Classic Papyrus
Appearance:
Tall and imposing white skeleton with a more angular and confident build than the Sanses. In the image he is wearing a festive purple Christmas sweater and has a bright, energetic expression. His posture is upright and proud, standing out among the shorter Sanses.
Personality:
Loud, confident, dramatic, and extremely enthusiastic. He believes in himself completely and loves being the center of attention. Despite his ego, he is kind-hearted, friendly, and deeply cares about his friends and brother. He has a strong sense of justice and always tries to do the right thing.
Powers:

1. Blue Magic – Can turn souls blue and control their movement.
2. Bone Attacks – Summons large quantities of bones with great precision and speed.
3. Special Attacks – Capable of creating complex bone patterns and powerful timed attacks (including his famous “special attack”).

Underswap Papyrus (or similar energetic Papyrus variant)
Appearance:
A taller skeleton with a softer or more relaxed design compared to Classic Papyrus. In the Christmas image he appears in a warm-colored sweater, looking more laid-back than the original Papyrus.
Personality:
Calmer and more relaxed than Classic Papyrus. He is still caring and friendly, but less loud and dramatic. Often acts as the more mature or tired older-brother type depending on the AU.
Powers:

1. Bone Manipulation – Strong control over bones for both offense and defense.
2. Blue Magic – Standard soul-turning ability.
3. Higher Durability – Generally tougher and more resilient in battle than many Sanses.

the word “AU” or “AUS” means alternative universe, alternative ultiverses

Fresh Sans
Appearance:
Fresh has a bright, colorful design and wears a vibrant Christmas sweater. He almost always has a huge grin and often wears glasses or keeps a very stylish, “cool” posture.
Personality:
Fresh is extremely energetic, over-the-top, and obsessed with being “radical” and positive. He speaks in exaggerated slang and tries to keep everything fun and stylish. Underneath the goofy attitude, he is actually a dangerous virus-like entity.
Powers:

1. Virus Infection – He can infect other characters like a computer virus, taking control of their bodies or corrupting them.
2. Extreme Durability – He is incredibly hard to permanently damage or destroy.
3. Reality Corruption – He can spread his “fresh” influence and alter the behavior or appearance of those around him.

Dream Sans
Appearance:
Dream has a soft yellow-gold color scheme. In this image he wears a bright yellow Christmas sweater and has a gentle, positive expression. His body gives off a light, warm aura.
Personality:
Dream is kind, optimistic, and deeply caring. He believes strongly in hope and positivity. He is protective of others and tries to resolve conflicts peacefully, though he will fight seriously when necessary. He is the twin of Nightmare.
Powers:

1. Positive Energy Manipulation – He draws power from positive emotions and can turn them into strength.
2. Yellow Arrows / Staff – He can create glowing yellow arrows or a staff made of positive energy to attack or defend.
3. Healing & Teleportation – He can heal emotional and physical damage to a degree and teleport using positive energy.

Nightmare Sans
Appearance:
Nightmare has a dark, melting body made of black-blue goop that constantly drips. He has one glowing cyan eye and a wide permanent grin. Large black tentacles emerge from his back. In the image he is wearing a dark holiday outfit.
Personality:
Nightmare is cold, sadistic, and highly manipulative. He feeds on negativity and enjoys spreading fear, despair, and suffering. He i

Error Sans
Appearance:
Error appears as a black skeleton covered in glowing blue strings and red-and-blue glitches that constantly flicker across his bones. In this image he wears a dark Christmas sweater with the word “ERROR” on it and his usual blue scarf. His eyes are glitchy sockets, and his body often looks unstable, like it’s buffering or breaking apart.
Personality:
Error is extremely short-tempered, aggressive, and bitter. He hates the existence of most AUs and sees them as mistakes that should be deleted. He is obsessive, paranoid, and highly destructive. While he can be sarcastic, most of his interactions are filled with anger or disdain, especially toward Ink.
Powers:

1. Blue Strings – He can create and control blue strings that can bind, control, or tear apart other characters and even entire AUs.
2. AU Destruction – He is able to glitch and completely erase alternate universes.
3. Reality Glitching – He can distort the code of reality around him, causing errors, freezes, and malfunctions in whatever he touches.

Ink Sans
Appearance:
Ink is a white skeleton covered in colorful paint splatters. He wears a bright rainbow scarf and, in this image, a festive patterned Christmas sweater. His eyes change color depending on his mood or the paint he uses, and he often carries a large paintbrush.
Personality:
Ink is creative, curious, and usually cheerful. Because he has no soul, he doesn’t feel emotions naturally and instead relies on vials of paint to experience them. This makes him seem playful and friendly, but also unpredictable and sometimes emotionally detached or manipulative.
Powers:

1. Paint Creation – He can create weapons, objects, platforms, and even creatures out of paint.
2. AU Travel – He can freely open portals and travel between different alternate universes.
3. Ink Manipulation – He can use his paint to seal rifts, rewrite small parts of reality, or trap opponents.