|“||Just like what happened to my people after 9/11. Every Arab man was targeted, questioned, followed, surveilled. They saw us not as humans, but as this hand of a monster that hated America. I saw people in my community act out in ways they never would have if they hadn't been treated so unjustly. Whatever you imagine people might have done, just don't lose faith in their humanity, because when you do, that's when you make the monster.|
— Nimah Amin to Miranda Shaw
Nimah Amin is seen at first as a conservative Muslim who keeps her private life behind closed doors. She has a twin sister, Raina Amin. They masquerade as one person, secretly switching positions. After they are revealed as two people, it is seen Nimah does not wear the hijab (headscarf) and is less religious than Raina. But Nimah had to wear the hijab to match her sister's appearance, and keep up the act. She has a deep love for America, but is constantly being profiled and mistreated as a result of her religion. Naturally, this becomes increasingly frustrating and Nimah has learnt to respond by isolating herself. Aloof and secretive, she often appears disinterested and mysterious to others. Has she become tired of loving a country that doesn't trust her? This could explain why she is much harder on herself than others and is constantly determined to reach her impossibly high standards. She might be considered confrontational but never guilty of cowardice. She is observant, analytical and extremely adverse to being manipulated. Personally recruited by FBI training director, Miranda, is she hiding bigger secrets from Alex Parrish and the rest of her classmates at Quantico?
Nimah, began as an FBI recruit at Quantico, as part of a covert project sanctioned by former Assistant Director, Miranda Shaw. Her sister, Raina was also recruited and the twins were told to often swap places, in order to maintain cover at the academy.
During their training days, Nimah had to don a hijab to pose as Raina; as she normally doesn't wear it. Eventually, the two sisters were finally revealed to the rest of the recruits after Simon Asher blew their cover. It was later revealed that Raina and Simon had romantic feelings for each other. Initially, she did not trust Simon and her suspicions were later confirmed during an exercise at the training facility. When she uncovered his past role in the Israeli Defense Forces, she found out that he was responsible for luring vulnerable women into interrogations. In addition, she further uncovered information about Simon's army general, who turned rogue and committed a series of physical abuse towards women. After exposing his secrets to the whole class, Simon is later kicked out of the training facility and then goes back to working for an IT company. Sometime later, the sisters became FBI agents after graduating from Quantico in Yes. After graduating from Quantico after the past events of Yes, the twins are assigned by Miranda Shaw and Agent Susan Coombs to infiltrate an Islamic terrorist cell led by Hamza Kouri.
Months later, the Grand Central bombing occurred, killing 132 people in the process. Initially, Alex Parrish was believed to be the perpetrator behind the terrorist attack. However, Caleb Haas, Alex, and Simon later discovered that one of the twins was at the terminal station, two days before the explosion. It was later revealed that Nimah was the one who visited the station, two days prior to the attack, having received a word that the terror cell was planning to detonate an American landmark. After Nimah explained the details of her mission to Alex, Simon, Ryan Booth, and Shelby Wyatt, Alex and Ryan rescue Raina as the FBI apprehends Shelby, Simon, and members of the terror cell. After being freed from FBI custody, Nimah and Raina are enlisted by Caleb, Shelby, Elias Harper, and Simon to help locate Alex and Ryan, who disappeared from the FBI. Eventually, Alex proves her innocence to the FBI and then her, Alex, Simon and Natalie Vasquez later unmasked Elias as the person who bombed Grand Central. After confessing that he was responsible, he revealed that he was not the terrorist as he was contacted by someone who threatened to have him incarcerated in a prison if he did not comply with his/her orders. Moments after Elias commits suicide, the FBI Command Center explodes which kills 32 additional FBI agents, including Clayton Haas.
Three months after the Command Center bombing, Nimah was assigned to work for the FBI field office in New York alongside Alex, Ryan Booth, Miranda Shaw, and Natalie Vasquez. Ryan, suspicious of Alex, later enlisted Nimah's help to locate Alex after being confronted by her the night before. Days later, Nimah, Raina, Alex, Ryan, Shelby, Caleb, Simon, Will, and Miranda realized that Liam was the traitor who blackmailed Elias and killed Clayton Haas, Natalie Vasquez, and Drew Perales. After Alex and Ryan kill Liam at the FBI Academy, Simon takes the nuke away from the land and eventually perishes during the explosion.
Months later, it was revealed that Nimah went back to working for the FBI. During a dinner conversation. Shelby was mentioned to Alex and Ryan that Nimah was successful in busting a cartel in Arizona. Some time later, Nimah and Shelby are ordered by Miranda Shaw and CIA Director Matthew Keyes to be Alex's and Ryan's handlers during their undercover operation at the Farm. The operation was to uncover the identities of the members of the AIC, a rogue faction within the CIA who were recruited potential recruits at the CIA's training facility, the Farm. However, Alex fails her undercover FBI mission and instead, stays at the Farm to complete her training. Meanwhile, Shelby goes undercover and starts a romantic with one CIA recruit, León Velez. During the mission, it was revealed that Ryan was supposedly recruited to the rogue group and was ordered to kill an innocent bystander along with León and Dayana Mampasi. Ryan later discovers, however, that the group was simply a CIA black ops division, and not a rogue group. Because Ryan and Alex failed to uncover the group of rogue insurgents within the Agency, Miranda ends the investigation.
Between the past events of EPICSHELTER and present events of Kudove, it was assumed that Miranda joined a CIA terrorist group called the Citizens Liberation Front. It was later revealed that Miranda joined the group to counter the AIC, which did in fact exist. Miranda also had Nimah go undercover with the terrorist group as part of an FBI operation. During the 2018 Hostage Crisis, Nimah revealed her reasons for joining the group to her sister. After the Islamic Front took credit for the 2018 Hostage Crisis, Nimah was pardoned for her actions and she later joined the Presidential Covert Joint Task Force. However, she later uncovered the real reasons as to why, she was added to the task force. Shortly after, she mentioned to Raina to take her position after her sister was suspected of a bombing attack in Ohio. While she was incarcerated at a prison, Raina posed as her, in order to continue her mission to take down The Collaborators, who were the hidden culprits behind the crisis.
- The name Nimah Amin is a palindrome, which is a word or phrase that reads the same backwards and forwards.
- She is Arab-American.
- Unlike her sister, Nimah is an atheist.
- In Clear, her Myers-Briggs personality test revealed that she is a commander type.
- After the graduation ceremony in Yes, she becomes an FBI agent.
- In Kudove, Shelby mentioned that she busted a cartel in Arizona.
- In ODENVY, she is revealed to be a member of the terrorist group, the Citizens Liberation Front.
- After the events in EPICSHELTER, Nimah becomes part of the covert joint task force put forth by President Claire Haas and CIA director Matthew Keyes. The task force was assembled to take out terror threats to the country made possible by Lydia Hall who uploaded one of the intelligence drives to the internet during the conclusion of the 2018 Hostage Crisis in New York. The task force also includes the following members; Alex Parrish, Ryan Booth, Shelby Wyatt and Dayana Mampasi.
- In MOCKINGBIRD, Nimah's file report which contained classified personal information was vetted by Owen Hall and Clay Haas in a private meeting. The latter wanted to find out if Nimah had the capacity to fulfil her role within the designated task force.
- In ODYOKE, Nimah decided to masquerade as Raina, going into a federal prison, after Raina was considered a main suspect in the terrorist attack at the Gallow Green shopping center in Beavercreek, Ohio.
- She mentioned to Raina that she deserved to be locked up after joining the CLF during the 2018 Hostage Crisis.
- In RESISTANCE, it was revealed that both Nimah and Raina were released from federal prison, after the death of President Roarke.