To the public, Ch'en Hui-chieh appears to be the stern Lung officer working for the Lungmen Guard Department. However, there is more to be revealed. She is not only Lungmen governor Wei Yenwu's niece, but also the younger half-sister of Talulah Artorius, the leader of the infamous Reunion Movement. The sisters had been separated since Kashchey kidnapped Talulah twenty years ago. Since then, Ch'en had been training diligently to protect Lungmen and in the hopes of someday meeting her sister once again. She put aside her hatred of her uncle, who she believed was responsible for her mother's disastrous remarriage, and learnt from him how to use Chi Xiao (赤霄, lit. "Crimson Firmament"), the legendary Dragon-Slaying Sword of Yan. As time passed, she achieved most of her goals, shaping her into a person with a strong sense of justice.

As the Special Inspection Unit Chief of the L.G.D., Ch'en is a trustworthy leader known for her brilliant tactics and her mastery over swordplay. In private, she is viewed as a headstrong—and perhaps somewhat stubborn—person. She has a feisty rivalry with her childhood friends, Lin Yühsia, daughter of the criminal leader of Lungmen's underworld, and Swire, her fellow L.G.D. colleague. Despite this, she does show her caring side to those whom she trusts, both Swire and her fellow colleague and long-time partner Hoshiguma.

Another incident in her lifetime would forever change her view of her uncle and the city. She contacted Oripathy along with her senior, Nine, three years ago (the year 1094), when she was injured during a mission by an Originium bomb. She managed to keep her position at the L.G.D. thanks to Wei's influence. Even so, with time, she got exposed to her uncle's hypocrisy during the Chernobog-Lungmen crisis, seeing the persecution of the Infected first-hand. Following the fiery battle against Talulah that ended the crisis, Ch'en decided to resign from her position at the L.G.D. and join Rhodes Island.

— I will be your bodyguard, Doctor.