sharpshooters ruth negga, tessa thompson, or jasmine cephas-jones as this girl's sister, daveed diggs or kid cudi as her brother. emmy raver-lampman, phillipa soo, leslie odom jr, ariana debose, the cast of julie and the phantoms (come on madison would make such an adorable 4th year cadet), jake gyllenhaal, hunter schafer, jacob elordi, angus cloud as a childhood friend from terra?