How did Rivet lose her arm?

How did Rivet lose her arm? Through flashback, Rivet explains that she was attempting to break into Nefarious’ facilities to try and put an end to his reign, but the Warbot caught Rivet in the act and tried to destroy her. However, the Warbot was unsuccessful, taking Rivet’s arm instead and allowing her to escape with her life.

Through flashback, Rivet explains that she was attempting to break into Nefarious’ facilities to try and put an end to his reign, but the Warbot caught Rivet in the act and tried to destroy her. However, the Warbot was unsuccessful, taking Rivet’s arm instead and allowing her to escape with her life.