Sans

Early Life
Sans's early life was well..practically nonexistent, from what he and his brother Papyrus remember at least. From what Sans gathered, he and his brother were found in an elevator one day lying asleep, and were taken in by the King of Monsters, Asgore.

The two skeletons learned surprisingly quickly about the world, despite having such little exposure, especially since there was a lack of a parental figure anywhere, considering there were no skeletons left after the Human-Monster war. The two skeletons eventually settled on living in Snowdin, where they essentially popped up out of nowhere, nobody knowing exactly where they came from, truth be told, neither did they. Life from there was relatively simple for the two, until a certain golden flower popped up.

This flower, which called itself "Flowey" immediately gave off bad vibes to the skeleton, especially considering how he seemed to instantly buddy up with Papyrus, it was around this time that Sans's lazyness became extremely noticeable by all, after he learned a terrible truth about the world, that everything was meaningless due to the ability of those that could reset.

As time went on, Flowey began causing more and more trouble for Sans, killing the entire population of the underground over and over again, each time forcing Sans to step forth, luckily resulting in the flower never achieving it's goals of emptying the underground, all this helped develop Sans's sense of nihilism, even if he couldn't fully remember everything, which he hid under his never-ending smile and jokes, which he used to prevent Papyrus or anyone from worrying about him.

However, this never ending cycle of stopping Flowey ceased when a human fell into the underground...and repeated the exact same cycle, only to a much faster extent, not even Sans was strong enough to end their bloody trail, resulting in Sans being left in a completely broken state, with no hope in sight for the pun-loving skeleton.

However, Sans tried to keep all this under-wraps as much as he could, not allowing it to get in the way of being there for Papyrus whenever possible, even if he isn't the best at it, after all, if the knowledge got out there of Sans's burden, who knows what would have happened?

Prologue
Sans was the first of the students to appear after Mocchi and Nagito arrived at the main part of the ship, with Sans walking around the area, seemingly astonished by how the ship looked, he had never seen anything like it before after all. After introducing himself, Sans joined the other two as they went around the ship, finding everyone that was on the main floor.

After arriving at the staircase, Sans went on his first power nap, quickly falling asleep whilst standing up. He remained like this up until Kyoko arrived with Shuichi, at which point everyone went down the stairs. It was here where he and the other 9 students met Peko and Rantaro, along with finding the tablet in his pocket. Before going down the elevator, Sans, along with several others had a bad feeling about going down, worried as to what could await them.

After arriving down on the first island, Sans was unclear about what exactly sand was, being that the underground does not have anywhere that sand might be present, he was also caught off guard at the sight of the ocean, astonished by how it looked. Afterwards, Sans proceeded to arrive in the supply closet, falling asleep for a significant amount of time until Peko and Mahiru entered, catching the skeleton off guard.

Chapter 1
Sans spent the majority of the day after the announcement of the killing cruise relaxing, attempting to get his mind off the situation, mainly by hoarding and proceeding to drink several ketchup bottles within the span of a few minutes. Upon the reveal of the motive of their being a traitor amidst the ranks, Sans once again became stressed out, secluding himself to an area on the island where luckily, he was undisturbed, there, Sans attempted to come up with something he could do, but he had nothing, eventually sleeping throughout the rest of the day.

On the third day, after the body discovery announcement, Sans managed to find a trail leading from a bush to the dock, along with assisting Mocchi and Kiibo in finding Peko's sword hid in the fridge for some odd reason. When it came to the trial, Sans at least attempted to be helpful, theorizing that whatever the poison was Rantaro drank caused him to hallucinate, resulting in him running away into the ocean, where he succumbed to the poison's effects along with drowning, this theory of course was wrong. Other than that, Sans spent the rest of the trial agreeing with things and just letting things play out, not entirely sure of where things were going until the end.

Chapter 2
Upon the beginning of the first day following the end of the trial, with the opening of the kitchen area on the ship, Sans decided to investigate the freezer area, making several bad puns while in there, his search coming up short nevertheless. After some antics in the kitchen, Sans returned to the main entrance of the ship's kitchen, falling asleep shortly afterwards.