|Ability||Unarmed Combat Skills; Close Quarters Combat|
|Relatives:|| Arthur Campbell (husband), McKenzie Campbell (son) ,|
Seth Newman (ex boyfriend)
Joan Campbell is the head of the CIA's Domestic Protection Division and wife of Arthur Campbell, head of Special Operations.
Joan has an efficient and cold personality at work, although she is dedicated to the safety of her agents, including Auggie and especially Annie.
Arthur is Joan's husband as well as her boss. This leads to some friction between them. Their relationship initially appears loving but it is clear they have issues balancing their personal and work lives, leading them to seek counseling. When Arthur resigns from the CIA he cites indescretion in his marriage, and Joan forces him to move out. Before this, Joan and Arthur were thinking of trying to start a family.
Seth Newman was an agent who was killed in self defense by Annie Walker. Although never confirmed, it is hinted that Joan was having an emotional and possibly sexual affair with Seth who was also her drug supplier until he realized the extent of her addiction and agreed to go with her to Narcotics Anonymous.
Joan has been shown on several occasions to have a soft spot for Annie, who is one of the brightest operatives in her division. She sees Annie much like a daughter and does her best to guide the young agent whenever possible. When Annie was transferred to the guidance of Lena Smith in season 3, Joan was very worried and unhappy with the decision, even going so far as to threaten Lena not to let anything happen to Annie.
Joan's relationship with Auggie is one of the least explored in the series, but she is seen giving him advice on how to balance his relationship with Annie.