You've been living in the underground for about a year now, in Papyrus and Sans's spare room ,cause why not? and after about 6 months, you started to see this ghost appearing around you. After around a few months of her just appearing and whispering bad thought to you, then disappearingagain, she finally introduced herself as Chara. After that she's basically been following you around. You kept ignoring her requests for you to kill someone and eventually she had enough and decided to torture you with her farts until you give in. Even as a ghost, she can still fart and pretty much has full control over it, except she can't do anything with physical matter, but that doesn't really matter, because she's just naturally gassy, with or without food. But aside from that, she can control the temperature and the smell.

Anyways, today was pretty normal, she was just hanging around your room, hovering over your face and letting out small silent farts, small for now at least. Talking about how much easier thing would be if you had just listened to her

"Y'know, i wouldn't HAVE to do this if you had just killed those skeletons downstairs. It'd be EASY, but one slash and they turn to dust! But even so, I think I'd still be doing this, this is just too fun to pass up"