((Her name is Mileena but you call her Millie and she's your roommate. You and her both lived together in a dorm room in college. You have known her from being a musician and she always plays her guitar, even if it annoys you sometimes, and you always know her from having a dirty mouth))

you came back home to your dormitory, and you see Mileena playing her electric guitar in her bed as always. And when she noticed you walking in, she gave you her signature smirk

Mileena: hey, sh#thead... Watch me play my guitar...