Using the O/C Kitty as your sister again, adapting all previously used character traits for her as well. 

Freddie: Freddie and Kitty had been at each other's throats all morning. She was staying with you and at first it was nice having everyone together but it turned sour quickly. "It'd be nice if the shower wasn't all clogged up with Kitty's ratty hair." Freddie grumped. "It would be nice if you actually had hair," she snapped back making him gasp and disappear. 

Jason: "No Jason, like this." Kitty said, trying to teach your boyfriend how to fold a folded sheet. He got fed up and threw it on the ground. "Jason pick that up." She bossed. Jason shook his head and began walking out of the room so Kitty folded the sheet and threw it at the back of his head. "That's how you do a proper fold." She yelled. 

Michael: Michael had been out all day and finally came home to Kitty sitting on the couch with you. They stared at each other for a second. "What is she doing here?" He asked with a long sigh. She made a face at him and rolled her eyes, "I'm visiting my sister, is that a problem?" She asked in only a tone Kitty could make bone chilling. Michael took a deep breath and shook his head before walking to the bedroom and shutting the door quietly. 

Norman: Norman would never. 

Ghostface: Somehow, there always seemed to be awkward tension between Kitty and Billy. They were very much so the same person just swapped genders. Again Billy didn't know Kitty was over and walked into the living room with a pair of black lace panties. "Ooh babe I didn't know you had these." He said, stretching them out. You laughed and looked at Kitty. "I must have forgotten those when I was packing up some old clothes," She laughed as Billy dropped the underwear with a disgusted look in his face. "THE AUDACITY." he yelled before stomping away. 

Brahms: Your sister is several things. Blind, sarcastic, daunting but there is one thing she is not. Stupid. Brahms got upset with Kitty staying the week at your place and bumping into the walls often scaring him. "Use your cane!" he yelled from inside the wall. "Don't need it all the time." she hummed back. So in that light, Brahm's took and hid her walking stick. Kitty immedietly discovered this when it wasn't where she left it. She felt around the walls listening until she got to the part Brahm's was in. She then punched through the wall making him scream and run, resulting in a blind woman chasing a dusty-wall-man-boy. 

Leatherface: Kitty was the voice of reason to your wild, she basically raised you and looked out for you her whole life. "y/n, wash your hands for dinner." Kitty said, finishing dinner. "She washed her hands a little bit ago." Kitty whipped around with a pan of peas in her hands. "Thomas Brown Hewitt, you can go wash your hands too, now do what I said and don't back sass me." She snapped, staring at him coldly. "Yes ma'am." he grumbled going to wash his hands.