Alina Park is an FBI agent who graduated third in her class. After her FBI graduation she requested an assignment in Anchorage, Alaska. Raymond Reddington requests that she be on the Post Office task force after she nearly kills Francesca Campbell. Seeing Alina's brutality, Reddington thinks she would be the right replacement for Samar. Alina accepts, on the condition that she tells Liz what happened in Anchorage. It is later revealed Alina fell into disgrace in the Anchorage FBI after flouting the law to catch her mother's ex-boyfriend, whom she blamed for her mother's fatal overdose. Upon encountering this ex-boyfriend on her return to Anchorage, Alina chooses not to kill him and allows the police to arrest him instead. After Liz's death the task force is disbanned and Park is been working as an assassin with her probable love interest, but she gave up killing people after falling in love with one of her victims and leaving the business to go works in an FBI training school. She is married to Peter, who is not keen on her getting in danger and working as a field agent. But, as Dembe needs help in capturing a criminal, she is on her way despite Peter’s unwillingness. She secretely joins the reunited task force, but she couldn’t keep her secret for too long. Park comes to Aram for help. When he is filling in the annual report, she asks him not to mention her permanent headaches as she afraids of losing her job and going off the field. Aram faithfully agrees to do so, but, when Alina stuns and loses the suspect in the recent crossfire due to her headache, she admits them happening and Aram posts it into the report, after which her position is strongly affected. She is sent off the field as the result of her constant headaches. Preseeing a soon rejection by the FBI and the Task Force, she turns to Red seeking a way to be engaged with the investigations, but, after a refusal, she returns to the Task Force and accepts her new role in the team.