Sister Gen, also known as Gen, is one of the main female characters in the American drama Suspect Tracking. Root is a hacker and professional killer with high IQ, whose real name is Samantha groves. After being destroyed by Finch and the machine, he became very interested in Finch and the machine. Later, he became a believer in the "machine" and wanted to liberate it.

Root disappeared after her mother died. In fact, she started her own revenge plan, killed the librarian's husband who killed her good friend, and mailed a "bouquet for algie Nong" to the librarian every year to atone for her friend's death.

In the fifth episode of Suspect Tracking, Genmei was shot to save Finch. On the way of Finch being transferred by Samaritan, Gen and Xiao arrived in time to save Finch. Under the cover of Xiao, Gen drove away with Finch. On the way to escape, Root and Finch are still being hunted. Root advised Finch not to defend blindly as he is now, and it was time to fight back with a "machine", but Finch hesitated.

In an ambush, Gengen was shot and their car was stopped by the police. Finch was taken to the downtown police station and Gengen was taken to the hospital. At the police station, Finch recalled that his friends around him fell down one by one. He finally decided to give up the rules he had been following. He is determined to fight Samaritan! The "machine" liberated the prisoners in the whole police station and helped Finch escape. At the same time, the bad news of the root sacrifice came.