Hsu Chia-chen and Hung Hsiao-hui had formerly been the most intimate of friends, often sharing many of their possessions. Both had been romantically involved with doctoral candidate Tseng Huan-tai, a more senior student in the same institute, and at times the three had even all shared the same bed.
許嘉真生前與洪曉慧交情匪淺，許多財物互通，並且同時與攻讀博士的學長曾煥泰交往。