#offendsans

I've been cooking this chaotic little gremlin for a while (since august 18th 2025) and I'm SO excited to finally share him with yall on tumblr!! Say hello to Offend Sans — the ultimate catboy disaster from the UnderSegments AU!! 😻

Appearance:

Classic white skeleton with a single glowing red left eyelight (right socket empty and dripping black like ink tears)

Red ecto-flesh below the ribs — soft abdomen, hips, and all the fun bits (he’s hermaphroditic like some Sanses 😉)

Crimson red bands on arms/legs

Often in oversized hoodies (sleeveless or with fake cat ears), shorts, and slide slippers — total comfy chaos king

Personality & Vibes:

Chaotic gremlin energy 24/7 — he is loud, obnoxious, attention-seeking, boundary-pushing

Screams random words, sings badly, steals EVERYTHING (chocolate, knives, hoodies, your heart)

Super needy — purrs when happy, bites shoulders to say "I love you",

Deep down? Abandonment issues and a big soft spot — he just wants to be kept forever

Calls Killer "daddy", Nightmare "boss-dad" — found family with the Bad Sanses gang!!

Abilities:

Shapeshifts into a small black cat (perfect for sneaking and cuddles)

Summons crimson glass shards as weapons/shields (they spin like deadly confetti)

Can teleport/shortcut anywhere (even restricted realms — sorry Dream 😏)

He's my baby and I love him so much — he's everything I wish I could be: loud, unapologetic, and loved anyway!! 🖤

What do you think? Want art? Headcanons? Drop asks or reblog with your thoughts!! I’m posting more renders, stories, and chaos soon~~

His reference and story are available on undertale oc wiki!

Offend Sans – The Gremlin Who Stayed (UnderSegments Main Timeline Intro Snippet)

The castle was never quiet after he arrived.

No one knew where he came from — just that one night, during a raid on a crumbling AU, Killer found a small black cat in the ruins. Crimson eyes glowing through the dust. Crimson bands on his paws like fresh blood. Hissing, but not running.

Killer picked him up. The cat purred.

Nightmare allowed it — one stray, one responsibility on Killer.

They named him Offie at first. Short for “little offender.”

Then he shifted.

One morning Killer walked into the kitchen to find a naked skeleton standing on the counter, face covered in stolen bacon grease, grinning like he owned the place.

“Hi daddy~” he said. Single red eyelight sparkling. Black drip trailing down his cheek like tears he’d never cry.

Killer dropped his knife.

Nightmare sighed from the doorway.

And just like that…

Offend Sans became part of the family.

He screams random words at 3 a.m. Steals chocolate from Error (and lives). Bites shoulders to say “I love you.” Purrs loud enough to rattle the throne. Shifts to cat form to nap in hoodies, on laps, or — his favorite — curled on Nightmare’s throne when he thinks no one’s looking.

He’s chaos in a red hoodie. He’s needy. He’s loud. He’s terrified of being left behind.

But in this castle?

He’s home.

And no one’s letting him go.

(Stay tuned for more chaos, cuddles, and gremlin antics from your favorite catboy disaster~ >:3)