Sans and Papyrus

🧒 FRISK

Role: The Eighth Fallen Human
Appearance: An androgynous human child with medium-length brown hair, wearing a light blue long-sleeve shirt with two purple stripes, blue shorts, and simple shoes. Their expression is neutral and silent throughout the game.
Personality: Frisk is a silent protagonist — their true personality is shaped entirely by the player's choices. On a Pacifist route, they are kind, merciful, and deeply empathetic, always seeking to resolve conflicts without violence. On a Genocide route, they become cold, ruthless, and determined to destroy everything in their path. They show incredible resilience and courage no matter what lies ahead.
Powers & Abilities: Possessions immense Determination — the power to SAVE, LOAD, and RESET the timeline, altering the course of reality. They can withstand supernatural attacks far beyond normal human limits and can connect with the souls of others.
Background: Frisk climbs Mount Ebott and falls into the Underground, a vast cavern realm where monsters were banished long ago. They are the eighth human to fall, and their arrival sets the entire story in motion. Their journey is not just about finding a way home — it is about deciding the fate of every monster they meet.
Secret: Frisk is NOT Chara — they are a separate, distinct being. The name "Frisk" is only revealed at the very end of the True Pacifist route by Asriel himself.

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💔 AFTERMATH

• The surviving monsters retreated deep underground, building their first home in what would become known as the Ruins. They named their settlement "Home."

• Over time, they spread throughout the Underground, building Waterfall, Snowdin, Hotland, and their capital — New Home.

• King Asgore Dreemurr took the throne, but he was heartbroken. He swore to find a way to free his people — but he never wanted war.

• Centuries later, after the tragic deaths of Asriel and Chara, Asgore declared that any human falling into the Underground must be killed, their SOUL collected to break the Barrier.

• This fear and separation created centuries of hatred, sadness, and isolation between the two races.

After winning the war, humans gathered seven of their greatest magicians, who cast a powerful magical spell to seal the monsters underground beneath Mount Ebott.

This created the BARRIER — a one-way magical wall that:

• ✅ Let anyone enter the Underground freely

• ❌ Lets NO ONE leave — except a being with both a human and a monster SOUL

• ✅ Can only be broken completely by seven human SOULs combined

Without warning, humans attacked the monsters mercilessly. The war was brutal and one-sided from the very beginning:

• Monsters were at a massive disadvantage. The SOULs of nearly every monster combined are only equal to the strength of ONE single human SOUL.

• Countless monsters were massacred. Not a single human SOUL was taken by monsters in the entire war.

• Monsters tried to defend themselves, but they were too weak. They were forced to retreat, overwhelmed by human strength and fear.

• Few monsters survived the slaughter — including Gerson, who later became the historian of Waterfall.

• Eventually, the monsters surrendered. The war ended with total human victory.

Long ago, two races ruled the Earth together in peace: HUMANS and MONSTERS. They lived side by side for centuries, sharing the surface world. Monsters possessed great magic and were gentle by nature, while humans were physically stronger and had far more powerful SOULs.

But over time, fear grew in the hearts of humans. They discovered that a monster who absorbs a human SOUL becomes a being of unimaginable power — a being that could easily destroy the entire human race. Driven by this fear, humans decided to strike first.

🐐 ASRIEL DREEMURR

Role: Prince of the Underground | Toriel & Asgore's Son
Appearance: A small, white-furred goat monster with short curved horns, long ears, and a fluffy tail. In his final form — God of Hyperdeath — he becomes a towering, angelic being with massive horns, feathered wings, and glowing eyes.
Personality: Kind, gentle, playful, and loving. He was always warm-hearted and cared deeply for everyone around him. Even after everything that happened, he cannot truly bring himself to hate anyone. Deep down, he just wants his family back and to be loved. He suffers immensely from loneliness and guilt.
Powers & Abilities: Incredibly powerful — can summon blazing fire, stars, lightning, and devastating energy attacks. As God of Hyperdeath, his power is effectively unlimited. He can control the timeline, erase souls, and destroy the entire universe if he truly wanted to.
Background: The only child of the royal family. He found Chara injured and fallen into the Underground, and brought them home. They became best friends and siblings. When Chara died, Asriel absorbed their soul and crossed the barrier — but refused to harm the humans who attacked him, choosing to die instead of fighting back.
Secret: He never wanted power or destruction — he just wanted to be happy with his family. Even as Flowey, without a soul, there remains a tiny spark of his true self buried deep within.

😶 NAPSTABLOOK

Role: Melancholic Ghost | Resident of Waterfall
Appearance: A simple, teardrop-shaped ghost with light-gray misty body, two simple oval eyes, and a thin line for a mouth. Always floating gently just above the ground.
Personality: Quiet, soft-spoken, humble, and a little gloomy. He often puts himself down, calling himself "boring" or "not interesting." Despite this, he is incredibly gentle, sweet, and welcoming. He loves music and creates his own electronic beats. He is one of the kindest souls in the Underground.
Powers & Abilities: Can turn invisible, pass through walls, and create illusions. He never truly attacks — he doesn't have the heart to hurt anyone.
Background: Mettaton's cousin. Lives alone in a dark, quiet house in Waterfall, making music for himself. He is one of the few monsters who doesn't judge or fear humans.
Secret: He isn't actually sad — he just likes melancholic music and thinks it fits his vibe. He's actually very caring and enjoys your company more than he admits.

• WD GASTER

Role: Former Royal Scientist | The Man Who Speaks in Hands
Appearance: A mysterious, shadowy figure — tall, dark, and almost featureless. His face is a white mask with a single black crack running down the center. He often appears with holes in his hands, missing body parts, or glitching in and out of existence. He is almost never seen clearly.
Personality: Enigmatic, highly intelligent, distant, and philosophical. He speaks in fragmented sentences and strange, poetic ways. He seems to understand everything about the universe, timelines, and reality itself — but is always just out of reach.
Powers & Abilities: Possessions knowledge and power beyond all monsters. He created the CORE — the infinite energy source that powers the Underground. He exists between timelines, can speak through others, and appears in random places. His very presence distorts reality.
Background: The Royal Scientist before Alphys. A brilliant mind who built the CORE and unlocked the secrets of the soul. One day, he fell into his own creation and was scattered across time, space, and countless timelines. No one knows exactly what happened to him.
Secret: He isn't dead — he is trapped between realities, watching and waiting. Sans may be the only one who knows how to reach him.

🧒 MONSTER KID

Role: Undyne's #1 Fan | Waterfall's Energetic Child
Appearance: A small, yellow, dinosaur-like monster with a wide toothy grin and big eyes. He has no arms — just hands directly attached to his body. He is always bouncing, jumping, or running excitedly.
Personality: Energetic, innocent, loud, and endlessly enthusiastic. He looks up to Undyne more than anyone else in the world and follows her everywhere. He is fearless, trusting, and sees the good in everything. He doesn't understand danger or when people are trying to tell him no.
Powers & Abilities: No special powers — he's just a kid. But he is incredibly brave and never gives up, even when things get scary.
Background: Lives in Waterfall and spends her days running after Undyne, telling everyone how cool she is. He doesn't realize Undyne finds him a little annoying — but she also secretly protects him like a little brother.
Secret: He never had arms — he doesn't even realize he's different from everyone else. He thinks everyone is built like him. His pure, unshakable belief in Undyne is one of the sweetest things in the Underground.

🖤 ​​CHARA

Role: The First Fallen Human | The "Angel"
Appearance: A child with short brown hair, rosy cheeks, and a green-and-yellow striped shirt. They look innocent, but their eyes hold a darkness and a centuries-old bitterness.
Personality: Quiet, curious, and deeply bitter toward humanity — they hate their own kind and wanted to destroy them all. They were kind to Asriel and loved monsters, but their hatred for humans drove them to a terrible plan. They are ruthless, determined, and entirely focused on their goal — no matter the cost.
Powers & Abilities: Possessions immense Determination — enough to rival Frisk. They can take control of a body, manipulate the timeline, and erase entire worlds. In the Genocide route, they become powerful enough to destroy the game itself and rewrite reality.
Background: The first human to fall into the Underground — long before Frisk. Asriel found them, and they were adopted by the royal family. They loved monsters, but despised humans. They hatched a plan to absorb Asriel's soul, cross the barrier, and kill every human — but Asriel refused, leading to both their deaths.
Secret: They are not inherently evil — they fell ill and chose their own death to save the monsters. Their corruption came later

🐐 TORIEL

Role: Caretaker of the Ruins | Former Queen of the Underground
Appearance: A tall, goat-like Boss Monster with white fur, two small curved horns, and long ears. She wears a long purple robe with a white triangular symbol on her chest and carries a golden staff. Her eyes are warm and gentle, filled with ancient sorrow.
Personality: Maternal, kind, gentle, and deeply protective. She loves baking butterscotch-cinnamon pie and teaching others. She is soft-spoken but firm when people she cares about are in danger. She has a heart broken by grief — having lost both her child and her adopted child — and fears losing anyone else. Despite her sadness, she remains hopeful and patient.
Powers & Abilities: Master of fire magic — conjuring blazing fireballs and magical flames that dance and swirl. She possesses immense magical strength and durability. She can also heal others and sense their presence.
Background: Former wife of King Asgore and mother of Asriel. She also adopted Chara, the first fallen human. After both children died and Asgore declared war on humanity, Toriel broke with him and retreated to the Ruins, where she has lived in isolation ever since, secretly protecting any human who falls.
Secret: She still loves Asgore, even after everything that happened. She stayed away not out of hatred, but out of refusal to accept more children being sacrificed.

👑 ASGORE DREEMURR

Role: King of All Monsters | Ruler of the Underground
Appearance: An enormous, powerful Boss Monster with flowing white fur, a long beard, and large curved golden horns. He wears a golden crown, red cape, and heavy golden armor. Despite his terrifying size, he always looks gentle and a little sad.
Personality: Gentle, soft-spoken, and kind. He loves gardening, tea, and flowers. He is warm, welcoming, and incredibly patient. He does NOT want to kill anyone — but he believes he has no choice. He carries the weight of an entire civilization on his shoulders and has done so for a long, lonely time.
Powers & Abilities: The physically strongest monster alive. He wields immense fire magic — capable of summoning massive fireballs and burning walls of flame. His physical strength is legendary, and he holds back considerably in battle. If he fought seriously, no one could stop him.
Background: Husband of Toriel, father of Asriel, and adopted father of Chara. After both children died, he declared war — vowing to collect seven human souls to break the barrier and free monsters. Toriel left him, and he has ruled alone ever since.
Secret: He hates what he must do. He delays the inevitable as long as he can, because he knows every soul he takes brings him closer to a victory he doesn't truly want. He waits for you with a cup of tea before your battle.

🦎 ALPHYS

Role: Royal Scientist | Undyne's Love Interest
Appearance: A short, yellow lizard-like monster with round black glasses, a white lab coat over a yellow striped shirt, and black boots. She has a long tail and messy hair. She is constantly fidgeting and looking nervous.
Personality: Anxious, shy, socially awkward, and easily flustered. She stutters, apologizes constantly, and lacks self-confidence. She is an otaku who loves anime, manga, and sci-fi. Despite her nervousness, she is brilliant, kind-hearted, and deeply cares about others — even if she's terrible at showing it.
Powers & Abilities: One of the most intelligent beings in the Underground — a genius scientist who created Mettaton's robotic body, conducted research on Determination, and built advanced technology far beyond human capability. She can hack computers, create robots, and manipulate energy.
Background: She became the Royal Scientist after fabricating a story about creating an artificial soul — something she felt was necessary to be taken seriously. She secretly experimented with injecting monsters with Determination to bring them back from death — creating the Amalgamates, a mistake that haunts her.
Secret: She loves Undyne but is too afraid to confess. She also has a crush on the human protagonist. She is the reason Flowey exists — she accidentally created him through her Determination experiments.

🐟 UNDYNE

Role: Captain of the Royal Guard | Hero of Waterfall
Appearance: A tall, muscular fish-like monster with bright blue scales, sharp teeth, and fin-like ears. She wears a black eyepatch over her left eye and her long red hair is tied in a high ponytail. She wears heavy, worn plate armor and carries a magical spear. She stands with perfect posture and radiates intensity.
Personality: Fierce, passionate, and unyielding. She is hot-blooded, honorable, and deeply loyal to King Asgore and her people. She hates humans — at first — believing they are all enemies. But beneath her tough exterior, she is compassionate, artistic, and deeply emotional. She loves anime and draws it in her spare time. She would die for what she believes in without hesitation.
Powers & Abilities: Conjures magical glowing spears that she can throw or launch in volleys. She controls water and can summon it from nowhere. She is a master warrior — fast, strong, and relentless. When determined enough, she gains Determination — allowing her to persist even after death.
Background: Orphaned as a young fishling, she was taken in by the previous Royal Guard captain, Gerson, who taught her everything she knows. She rose through the ranks to become captain and is fiercely devoted to protecting monsters.
Secret: She doesn't truly hate humans — she's just been taught to. If you show her kindness, she becomes one of your closest friends and will do anything to protect you.

💀 Papyrus

Role: Aspiring Royal Guard | Sans's Younger Brother
Appearance: A tall, lanky skeleton wearing bright red-orange shoulder armor, a red cape, blue pants with a gold belt, and black boots with gold accents. He has "fang-like" teeth and a permanent confident grin. He stands nearly twice as tall as his brother.
Personality: Loud, enthusiastic, dramatic, and incredibly confident — always referring to himself as "THE GREAT PAPYRUS!" He is energetic, ambitious, and desperately wants to be in the Royal Guard. Despite his grandstanding, he is genuinely kind, innocent, and wants nothing more than to be your friend. He believes in second chances and sees the good in everyone.
Powers & Abilities: Summons bones of various sizes and colors — blue bones that hurt only if you move, and orange bones that hurt only if you stand still. He is surprisingly fast and physically strong, although he holds back in battle. He creates elaborate puzzles and traps to test intruders — though most are too easy.
Background: He and Sans came to Snowdin from somewhere unknown. He is determined to capture a human to prove himself to Undyne and join the Royal Guard — not out of malice, but because he thinks it will make him popular and respected.
Secret: He is actually lonely. He acts tough and confident because he wants people to like him. If you befriend him, he becomes one of your most loyal and devoted allies.

💀 SANS

Role: Lazy Skeleton | Snowdin's Local
Appearance: A short, stocky skeleton wearing an unzipped blue hoodie with white fur trim, black basketball shorts with white stripes, and pink slippers. His eye sockets are usually empty white — but when serious, his left eye glows bright blue and yellow, flashing with intensity. He is always seen with a wide, lazy grin.
Personality: Extremely laid-back, perpetually lazy, and loves bad puns and jokes. He sleeps on the job, slacks off at work, and avoids responsibility whenever possible. He appears goofy and carefree — but beneath that mask, he is observant, intelligent, and carries a heavy burden. He is deeply protective of his brother Papyrus and cares more than he lets on.
Powers & Abilities: Can teleport (shortcuts), summon massive skull-like energy cannons called Gaster Blasters, and manipulate gravity to pin enemies in place. He attacks with sharp, glowing bones. He has the ability to sense when the timeline has been altered or reset — making him one of the few beings aware he is in a video game.
Background: He and Papyrus appeared in Snowdin one day, seemingly out of nowhere, and no one knows where they truly came from. He promised someone long ago that he would keep an eye on any human that showed up — and he takes that promise seriously.