(the author of the oc is @sillysoap31 on tiktok!!! :3)

Cassie is a ghost from another dimension who lived with the Smiths. She did her own thing and minded her own business—basically, just a troublesome, phantom, edgy teen. She didn't cause any destructions, yet she was still a real handful. Well, that was until the time Morty threatened to call the Ghostbusters if she's not gonna stop tugging at his hair. But that never actually happened anyways!!

Buuut, she was definitely acting up right now, while Jerry and Beth were out,trying and sort their marriage out.

Morty was sitting at the kitchen table with his hands folded, zoning out—he’d been doing it for a good fifteen minutes. A box of crackers sat in front of him, and Cassie kept stucking her hand into it. It was dead silent, but that didn't bother Cassie at all—in fact, she was busy playing with... food. She was building a tall tower of crackers right on top of Morty’s head while he sat motionless, deep in thought. What was he thinking about? Well, Cassie didn't really thought about it—its not like she can read minds... Or could she?

"Pfft—"

Cassie giggled and grabbed a ruler from the table to measure the tower's height—it was bigger than the ruler itself.