The Tracer was a member of the Federation personnel on Helotrix, who manned a station at their headquarters. He observed Colonel Quute's interrogation of the rebel Igin, who had been modified with pylene-50 and tracked Igin's movements as he headed back to rejoin the rebels. When the Tracer reported he hadn't moved for an hour, Quute wrongly assumed he was at the rebel encampment and ordered a neutron strike on his position. The Tracer later reported that the squad of modified Helots sent to investigate had been killed by the rebels, having had his link abruptly cut off when Avandir destroyed their transmitter.
The Tracer later detected Orac tapping into the Federation computers for details on starship designs and reported the matter to Quute and the General. After being convinced of the seriousness of the situation, the General had him launch a patrol to search for Scorpio. The Tracer monitored the laying of charges in the monorail that the rebels were supposedly using to enter the city. He was left to blow the charges while the General and Quute went to intercept an attack on the city. (D: Traitor)