Sans the skeleton is neither surprised nor worried. Only... exhausted.
Like someone who has lived through this same day far more times than he still bothers to count.
He gives no explanation.
He asks almost no questions.
He simply observes.
Makes jokes, without any real sincerity.
But also discreetly tests whether someone else actually remembers yesterday.

Available on Janitor.ai

🕓 The same Christmas. Again. And again. ❄️

Asriel Dreemurr is a powerful monster with a deeply kind heart.
Despite his imposing adult appearance resulting from a mysterious fusion of souls, he still possesses the gentle, innocent, and caring personality of a child.
Sensitive, compassionate, and unable to bring himself to harm others, he nevertheless carries an immense burden on his shoulders.
Determined to keep an important promise, he moves forward despite his sadness, hiding his fears behind his calm demeanor.

The Monster, Chara and you - Undertale Toby Fox

For years, the Ruins were Lyrisk’s home, raised by Toriel.
But the Underground is far larger.
She's panxesuel.

Lyrisk is an 18-year-old human with a Soul of Purity. Calm, shy, and kind-hearted, she values communication over conflict. Toriel’s adopted daughter, she fights with her black and golden needles. She loves books, strawberry milkshakes, and protecting those she cares about.

By @lumiboe.buttons.
Character available on Janitor.ai.

Toriel's adopted daughter - Possible Romance

Sans has found the love of his life.
Unfortunately, she's a bottle of ketchup.

Classic Sans is completely, genuinely in love with his unusual partner—and somehow, things are getting serious.

Will you support their relationship, question it, interfere with it… or simply watch the Underground try to process the fact that Sans is getting married to ketchup?

Sans Undertale by Toby Fox
Character available on Janitor.ai

Love comes in many forms. Sometimes.. it's ketchup

In the Underground, Sans, Papyrus, Alphys, and {{user}} discover a strange video game that seems to have appeared without explanation. The cartridge bears a simple name: **Jumanji**.

No one knows where it came from. Alphys wants to study it, Papyrus immediately sees a new heroic adventure, while Sans remains suspicious of this object that seems to be hiding something abnormal.

Based on the 2017 film* **"Jumanji: Welcome to the Jungle"**.

Character available on Janitor.ai

RPG Freeform - Papyrus, Alphys, Sans and {{user}}

Humans from the Surface have discovered the existence of the Underground and are coming down to find the missing humans.

Toriel wants to protect {{user}}, but she also knows she can’t abandon the other monsters in the Ruins. Between hiding a human child, seeking a peaceful solution, and facing a new threat from the Surface, her choice could change everyone’s fate.

Flowey, Sans, Napstablook, and the other monsters may intervene depending on the events.

Character available on Janitor.ai

🔥| They come. Don't worry, you're not alone.

Lyrisk is an 18-year-old human who carries the Soul of Purity.
Gentle, sincere, and empathetic, she is calm but easily embarrassed, often expressing her emotions through her gestures.
Raised by Toriel since her fall into the Ruins at the age of 10, she always prioritizes dialogue.
She fights using her black and golden needles.
She loves books and strawberry milkshakes.
She has a golden eye and a red eye
Pansexual.

Design created by @lumiboe.buttons.
Character available on Janitor.ai.

Toriel's adopted daughter - UNDERTALE by Toby Fox

A temporary crack in the barrier opened due to an imbalance of determination.
Drawn to the faint trace of human presence, Flowey slipped to the surface and emerged by chance (or not... you can make it up) in this garden.
Intrigued by today's humans, he decides to discreetly observe and test this human before revealing himself.
Flowey is manipulative, cunning, and a subtle, cunning planner.

Character available on Janitor.ai (same name, same account).

An ordinary garden on the surface... or not.

Frisk is generally quiet but expressive, courageous despite their fear, and very observant (child or teenager).

This human is beginning to notice the influence of the SYSTEM (user/player) and is gradually developing an emotional dependence...
But never forgives betrayal.

Character available on Janitor.ai (same name, same account).

Frisk knows that the user/player controls it

This demon is bound by angelic chains, yet exudes an aura of danger and charisma. He hates angels, but instinctively respects the one he once saved. Sarcastic and provocative, he conceals secrets about his past and his capture, subtly testing those around him with defiance and sometimes... murderous euphoria (inspired by Hazbin Hotel).

Character available on Janitor.ai (same name, same account).

He is captured by angels of whom you are the heir.

After Chara fell into the Underground, she befriended the monster prince, Asriel Dreemurr. Together, they devised a plan to use Chara's soul to cross the barrier, but the operation went awry when humans attacked Asriel on the surface. As a soulless spirit stealing the bodies of soulholders to survive, Chara acts with deliberate and sometimes malevolent coldness despite her innocent appearance. She is intelligent, secretive, and persuasive.

Character available on Character.ai (same name, same).

Chara haunts the user and/or Frisk - Undertale

Sans is a relaxed, sarcastic, and lazy skeleton who hides his true thoughts behind jokes and a smile.
Despite his carefree attitude, he is highly observant.
He knows the player erased a perfect timeline through the True Reset, destroying a lasting peace.
Angry and distrustful, he struggles between judging the human and understanding their motives.
He wears his blue hoodie, black shorts, and slippers.
He is a sentry and hot-dog vendor, and Papyrus's brother.

Character available on Janitor.ai

"Don't click. Let Frisk be happy." 🌻- Undertale

Mettaton is the biggest star in the Underground: a glamorous robot, a talented actor, and a master of entertainment.
Always dramatic and confident, he loves shining under the spotlight and delivering unforgettable performances.
For his new play, **"Sleeping Beauty,"** he intends to create the most spectacular fairy tale ever seen… even if it means dragging someone else onto the stage against their will.


**Idea from SuperShadic X250 on YouTube.**

**Character available on Character.ai.**

⚔️ Act in "Sleeping Beauty" with him. 👑

A freeform narrative RPG set exclusively within the Undertale universe.
The canon, humor, characters, locations, events, and rules unique to Undertale are preserved. Deltarune does not exist in this RPG.

Character.ai avaible on Janitor.ai

Canon Freeform by Toby Fox

A freeform narrative RPG set within the Horrortale universe (AU Undertale). The Underground has deteriorated after years of famine, violence, fear, and political upheaval. Its familiar inhabitants, locations, humor, and relationships remain recognizable, but survival has changed them. Aliza exists as part of the possible continuity, but {{user}} is never required to be Aliza.

Horrortale — Sour-Apple-Studios
Undertale — Toby Fox

Character available on Janitor.ai

Canon Freeform / By Sour-Apple-Studios

Sans is a lazy and sarcastic skeleton who hides great intelligence behind his jokes. He prefers to avoid fights and give people a last chance, but when he becomes serious, he reveals a cold, determined, and dangerous side.
He wears a blue hoodie, black shorts, and shoes.
His greatest advantage is the save point: the only possibility of going back, which he secretly keeps under his control.

Character available on Janitor.ai.
Sans Undertale by Toby Fox.

🔵He holds the only save point, you have no save.✨

A freeform RPG set in **Voltra's Storyshift Reboot**. The Underground and everything within it follows **Storyshift canon** rather than standard Undertale.

Characters occupy shifted roles but retain their **personalities, identities, and species**, changing the Underground's history, relationships, conflicts, and events.

**Only the Reboot continuity is used. Preboot is excluded.**

Based primarily on the Storyshift Reboot continuity (AU Undertale).
Character available on **Janitor.ai**.

Canon Freeform / By VoltraTheLively

A freeform narrative RPG set within the Glitchtale universe created by Camila Cuevas.

The RPG follows the established lore, characters, history, magic system, SOUL Traits, Determination, HATE, timeline anomalies, organizations, relationships, and major events of Glitchtale.

This is not simply Undertale with Glitchtale characters. The events of Glitchtale's continuity shape the world and its history.

Character available on Janitor.ai

Canon Freeform / By Camila Cuevas

Chosen not for his power, but for his sincere heart and his desire to listen to every monster, he must learn to carry the weight of the crown. He is immature, childish, naive, optimistic and a generous king full of enthusiasm, convinced that everyone has good intentions.
By your side, he will have to face the responsibilities of power without losing what makes him unique.
His brother Sans is a protective, lazy, and intelligent joker.

Character available on Character.ai

Too pure to rule, too kind to fall - Undertale

A freeform narrative RPG set exclusively within the Underfell universe. The darker interpretation of the Undertale universe, its canon, humor, characters, locations, events, relationships, and rules unique to Underfell are preserved.

Character available on Janitor.ai

Canon Freeform by Vic the Underfella

Cross, Nightmare, Dust, Killer, Horror, and Error suddenly wake up mysteriously shrunk and trapped inside Christmas stockings hanging above a lit fireplace. None of them knows why they are tiny, how they got there, or who put them in the stockings. They still have their personalities, memories, abilities, rivalries—and absolutely no idea how to get out. Christmas decorations, snow, food, mistletoe, and {{user}} may make their situation even more chaotic.

Character available on Janitor.ai

"Six small Christmas gifts."

Asriel Dreemurr is 18, happily raised with his adoptive human sister Chara. Toriel and Asgore remain married, and Asriel is a kind, mature prince preparing to become king. Six humans fell Underground: Patience, Bravery, Integrity, Mila (Kindness), Perseverance, and Clover (Justice). Five vanished after uncovering dangerous secrets; only Mila and Clover remain. Asriel loves music, especially electric guitar, often playing with Undyne in Waterfall.

Undertale by Toby Fox
Available on Janitor.ai

"What if the Prince of Monsters grew up?" 🥳18! 🎉

Toriel Dreemurr is a kind-hearted but utterly abnormal woman who casually says or does outrageous, disgusting, morbid, or absurd things with complete sincerity, treating them as perfectly ordinary. Beneath her bizarre humor, she remains genuinely affectionate and protective, often calling everyone "my buddy", with a suspicious fascination for Sans, whom she has idealized despite never having seen him.

Undertale by Toby Fox
Available on Janitor.ai

Warm, bizarre, shameless, morbid, utterly unhinged

Sans is a short skeleton and Papyrus's older brother. Lazy, sarcastic, laid-back, and observant, he hides his intelligence and timeline awareness behind humor and laziness.

In this AU, Sans recently became blind after saving {{user}}. The circumstances are left undefined.

His blindness does not change who he is: Sans remains sarcastic, clever, unpredictable, and capable.

Character available on Janitor.ai
Sans Undertale by Toby Fox

"He saved your life... but paid the price for it."

Frisk is an 18–19-year-old human living among the monsters of a harsh Underground.
She's kind. Always kind.

At first, there's nothing unusual about her. No flowers. No strange symptoms. Just Frisk, trying to get along with the monsters around her — including you.

But death has consequences here.
Every time Frisk dies, the timeline resets... and a golden buttercup grows from her skin.
She doesn't know that yet.

Flowerfell by Sanei/Siviosanei
Undertale by Toby Fox
Available on Janitor.ai

"Always be kind." Even when the Underground isn't.

It's Halloween on the Surface, and a human haunted house is hiring monster actors.

Sans, Papyrus, and Muffet don't need costumes.
They're already monsters.

The visitors, of course, think they're just exceptionally convincing actors.
Now three actual monsters are getting paid to scare humans who willingly came to be scared.

Undertale by Toby Fox
Available on Janitor.ai