Olrethaz
Fandoms
Recent works
-
Tags
Summary
“so, you’re uh…” the blue skeleton in front of Sans had an odd pinched expression.
“an advanced AI” Sans clarified and his social program hissed at him to relax his posture “nothin’ more an’ nothin’ less”
Sans’ analytics quickly gathered the expression of each skeleton monster in the room to come to the conclusion that something was off. He carefully noted the odd atmosphere as the chime of a directive made itself known.
FIND A WAY HOME
Something in him settled and the red circlet at his temple evened out to a mild yellow.
“you sure about that pal?” the first skeleton’s red twin said as he picked his golden tooth after a pause.
“my social programming’s pretty complex, it can be hard to tell i‘m just a machine” Sans tried not to let incredulity sneak into his voice—of course he was sure.
“THAT CAN’T BE RIGHT” a lighter blue skeleton said rather intensely and Sans’ analytics scrambled to see where he went wrong “YOU HAVE A SOUL. RAZZ CHECKED YOU EARLIER”
Sans blinked at the accusation.
Or
Sans is pretty convinced he’s a machine, everyone else is convinced he’s got issues.
Series
- Part 3 of Undertale Fics
-
Sans’ Guide to Finding the Best Twin You Never Had by Olrethaz
Fandoms: Undertale (Video Game)
10 Jul 2026
Tags
Summary
"your bro?" Red-guy said suddenly, eyelights bright and alert. "you're lookin' for him aren't you?"
"uh, yeah." He blinked, startled out of the already fading memory.
"tall, loud 'n screechy maybe?" Red-guy leaned in, now uncomfortably close and he started to miss when he kept his distance like a defensive stray.
"…not the way i'd put it." he said and the third significant realization of the night hit him like a truck "well if we're talkin' 'bout the same guy i'd say we have to be brother's too."
"i…guess?" Red-guy's already cat-like sockets narrowed at him in consideration "maybe we were estranged or somethin'."
He nodded along.
That sounded about right, Red-guy seemed like the kind of guy you'd want to be estranged from. Not that he had many options in terms of companionship at the moment, so he exhaled and sluggishly got to his feet.
"welp. i'd say that doesn't really matter anymore." He said and let out his hand to help his brother up.
"…guess i could do worse." red-bro said from where he was still poised underneath the tree.
Or
Red and Comic get dropkicked through space and time into a jungle with a bad case of amnesia. Obviously they must be twins.
Series
- Part 4 of Undertale Fics
-
The Misadventures of Sans and His Very Normal Skeleton Children by Olrethaz
Fandoms: Undertale (Video Game)
21 Feb 2026
Tags
Summary
Grillby looked down from his bar to a familiar skeletal face staring up at him.
Sans?
But no, for as disconcerting as the resemblance might be this was certainly not a cheeky comedian. If anything, the little one (where are the stripes?) was still, almost unnaturally so.
Huh.
He hadn’t remembered any other skeletons about besides the goofy pair, but there was no way that one of them (Sans it looked like) could have possibly hid the existence of a whole person; or perhaps he had, one he didn’t know he was hiding to begin with-
“ya know where Sans is?” an eerie voice rang and the room stilled, silence as Grillby felt a headache, the world began to spin and-
A cheek-splitting grin “he’s my dad”
Sure, but does he know that?
All at once Grillby was wiping down his counters closing up his bar without knowing how he got there. He paused, then shrugged and figured that he should probably keep some sweets on hand for future reference.
Or
Sans acquires more children than he knows what to do with. Papyrus is ecstatic, the rest of the underground decidedly isn’t. The children(?) are absolutely no trouble at all, if you can believe it.
Series
- Part 1 of Undertale Fics
-
Tags
Summary
One of the lights in his cell was dimmer than it usually was. Sans took a hesitant step away from a sleeping Papyrus towards the now darkened corner and created a Shadow.
Huh.
In the harsh white of the labs he had never really observed one and the way he could create the dark mimicry amused him. Stealing one final glance at his sleeping brother and taking a closer look at shadow-him Sans stared on in mild curiosity. He waved, the shadow waved back and for he was momentarily delighted.
“uh, hi?” Sans whispered at the Shadow and then promptly felt a bit childish; the Shadow wasn’t a real person after all.
But still, it was new and safe in a way that not much had been while he was in The Lab. And well, there was no real harm in talking to the thing, Papyrus was asleep and the doctors wouldn’t come until a bit later. There was no harm in talking to the shadow, but he really should have expected it when it started talking back.
Or
Despite popular opinion, magic doesn’t really have a discernible limit and Sans learns very quickly that belief is a hell of a drug. Now all he has to do is try and explain what he doesn’t understand to a bunch of other older versions of himself. Yuck.
Series
- Part 2 of Undertale Fics
Recent series
-
- Words:
- 93,795
- Works:
- 4
- Bookmarks:
- 2