Agent Susan Coombs is a FBI agent that lectured for a career open day to NAT recruits at Quantico. She was introduced in the episode Fast. She is portrayed by Mandy Gonzalez.
She was the handler for an FBI sanctioned operation involving the twin sisters; Nimah and Raina Amin.
The operation entailed the twin sisters infiltrating one of Hamza's terrorist cells.
In Drive, Susan had a discussion with the twin sisters. They stated that they want to go after the terror cell that attacked Quantico in Turn. Susan worries about putting them into such a dangerous assignment during their training period at the academy, but states that she will speak to her boss.
In Right, Susan gives the twin sisters permission to participate in the operation to infiltrate the terror cell after getting an authoritative approval from her boss.