They're 4'10, their pronouns are he/they/it, n ofc they do have Tourette's. :3
He is a shapeshifter, made of goop that can morph into any shape, but this is the form he takes a majority of the time.
He lives in Underfell's Waterfall, in a hidden cave.
(warning: possibly uncomfy topics. including mild stalking (? not quit?). and death to heat/cold in the last big paragraph.)
They've always stayed hidden out of fear of being dusted, and when they do go out, they stay camouflaged and close to the walls. So he's a big hermit and rarely interacts with people, but he does like to people watch (at least. when someone isn't killing another lmao), and it is usually the only reason he will leave his cave at all.
People sometimes hear random noises in Waterfall, and feel like they're being watched, but when they don't see anything, they usually just chock it up to them losing it. Sans (Red) however isn't so sure of that when he keeps getting that feeling, and hearing those sounds consistently in Waterfall, and Waterfall only, just about every time he's there.
Sans is it's favorite to watch, and it will even follow him around Waterfall. They don't do this in a creepy way (or at least they try not too lmao), it's more like how a very curious animal might follow someone from a safe distance. :3
They wish they could follow Sans outside of Waterfall, but really cold weather makes their body very stiff, and makes it hard to move and shapeshift. If they're in the freezing cold long enough, they will literally freeze solid and dust (they are also cold-blooded, so they can not warm themself up). On the other hand, really hot weather will have the opposite effect. They will start to melt, and it will become very hard to keep any form. If hot enough (like in Hotland, literally above lava), they can even start to boil, and will dust that way too.
Both of these can also put them in a vulnerable position, which can be extremely dangerous, living in Underfell.
