sorry for the late reply but i would love this! we could maybe say their fathers also worked in the same station (aya's father is a firefighter) and they met that way? they figured since they both had daughters the same age and zina maybe didn't know anyone when she came to visit they could hang out and they instantly clicked and became best friends. aya's mother also passed away in a sort of horrific way when she was around 12 so that summer she probably would have been attached to her the whole time and maybe the only one who knows how her mom really died since she doesn't share it with everyone. she would have also been thrilled if zina attended sfsu like 'ITS ABOUT DAMN TIME YOU FINALLY MOVED HERE.'