depending on what you had in mind for her. i can throw charlie in for everything from neighbor/former neighbor on the upper west side. drunk or random hook up (one night or repeat). someone that showed up to a party wearing the same outfit and they thought they would immediately be mortal enemies but ended up hitting it off and became friends. the relative of someone she was sugaring for that found out and they became friends that strange way. orrr anything else we can come up with, since those are all random off the top of my head things