Their relationship is sometimes referred to by the fan-given nickname Naomily (taken from Naomi and Emily).
In Everyone, Naomi and Emily are seen looking at each other in their introduction assembly. Emily tries to speak with Naomi about their kiss the year before but is brushed off. Emily is uncomfortable with Katie making homophobic slurs to Naomi but doesn't say anything.
In Thomas, Emily finally tells Katie the truth about how Emily was the one who initiated the kiss between her and Naomi, blaming it on the MDMA she took. She and Naomi almost kiss again but Naomi leaves, telling Emily that she is straight, something Emily needs to accept.
In Pandora, as Naomi and Emily arrive together to Pandora's sleepover, Naomi urges Emily to admit that she is gay, but Emily denies it. JJ goes into the house by himself and sees Emily and Naomi kissing. Naomi and Emily kiss again later, this time, the kiss being witnessed by Katie.
In Naomi, Naomi avoids Emily at school and instead meets with her politics teacher Kieran. In the students' common room, they are informed of the upcoming elections for Student President. Emily encourages Naomi to run, but Naomi refuses. When she arrives at her house, she finds Emily waiting in her bedroom with another registration form (Naomi had also gotten one from Kieran). Emily starts to leave when Naomi is rude and standoffish to her — despite taking Emily's advice to enter the elections — but confronts Naomi instead. She tells Naomi that, despite having kissed her twice previously, she is more interested in friendship than a sexual relationship with her, and Naomi invites her to stay for the night.
When Naomi wakes up the following morning, she leaves Emily in her bed as she goes to college. Naomi is doubly humiliated in front of the forum when Cook ridicules her and Emily subsequently stands up for her. Later, shocked that Kieran had kissed her, Naomi finds a note from Emily in her bed, and cries herself to sleep.
Naomi and Emily escape to the countryside the next day and cycle to one of Emily's favorite places by a lake. After swimming in the lake, they light a campfire. Naomi kisses Emily, and they proceed to have sex. Emily wakes up the following morning to find Naomi preparing to leave. She pleas for Naomi not to leave her a second time, telling her that she should accept that she needs to be loved, but Naomi rebuffs her.
That night, she visits Emily's house, but Emily refuses to open the door, not wanting Naomi to see her after she had been crying. They sit on opposite sides of the door, and Naomi admits that she does need somebody to love her. Emily offers her hand through the door's catflap to Naomi, who finally reciprocates Emily's feelings.
In Effy, Naomi and Emily sit next to each other in the car on the way to the campsite and also share a tent in the woods. When they go looking for Katie, they walk together holding each others' hands.
In "Katie and Emily", Emily, disguised as Katie, arrives at college to pretend that her twin sister is returning to school with nine stitches to the head after being hit with a rock by Effy, who has disappeared. In actual fact, Katie is at home, miserable over the loss of her boyfriend Freddie, who only dated her to spite Effy, whom he really loved. She also begins to take notice of all the hints in front of her, and realizes that Emily is gay.
At college, Naomi uncovers Emily's disguise and tells her that she plans to spend the summer alone in Cyprus. When Emily tells Naomi that she will miss her, they kiss in an empty corridor and later find themselves at Naomi's house where they have sex. Afterward, Emily asks Naomi to the college ball, but Naomi, still crippled by insecurity over her sexuality, refuses, leaving Emily heartbroken.
Emily leaves and at the bus stop meets Thomas, who offers her his shoes and jacket and is unconcerned when she tells him that she is gay. He tries to comfort her but admits that he believes it impossible to stop loving somebody, referring to his ex-girlfriend Pandora. Emily returns home and comes out to her family, telling them that she has been having sex with a girl named Naomi. Her father, Rob, dismisses it as a joke and her mother, Jenna, is speechless, while Katie tries to deny it. She and Emily have a heated argument, leaving Katie crying.
The following morning, Naomi visits the Fitches' house, but Jenna answers the door. She confronts Naomi, convincing her that Emily is not gay and warning Naomi to stay away from her. After waking up, Katie and Emily reconcile in their own secret language, and Emily reluctantly agrees to go to the ball with Katie. While shopping for ball gowns, they meet Pandora, who is returning a dress since Thomas has not forgiven her for her infidelity with Cook. The twins run into Freddie and JJ while trying on dresses. JJ reveals to Emily that he told Freddie that he had sex with her, and Freddie inadvertently tells Katie, who was unaware of this. She guilts Freddie into accompanying her to the ball and volunteers Emily to go with JJ. Later, she is furious with Emily for having sex with JJ without her permission, still insisting that Emily is "not gay, [just] stupid." Katie intercepts one of Naomi's phone calls to Emily and tricks Naomi into meeting with her, where she reveals Emily's fling with JJ and warns Naomi not to come to the ball.
As Katie, Emily, Freddie and JJ prepare to enter the ball, Naomi arrives, announcing that she knows about Emily and JJ before she walks in. An upset Emily leaves, while Katie starts a fight with Naomi, where she reveals her deceit against her sister. After overhearing everything, Emily attacks Katie, wreaking havoc on
the entire ball. Emily finally overpowers her sister and prepares to punch her, but reconsiders and instead helps Katie to stand up. In front of everybody, Emily tells Katie that she is her own person and that she is in love with Naomi. Katie accepts Emily's individuality and sexuality, and Naomi, no longer ashamed of their relationship, extends her hand to Emily. The couple leaves the ball hand-in-hand and Naomi tells Emily that she loves her too.
In Thomas, Naomi and Emily are present when a girl named Sophia kills herself after taking MDMA at Thomas's party. Although Thomas originally thinks Cook sold the drugs to Sophia, Naomi reveals that she did it, and begs him not to tell Emily.
In "Emily", the episode begins with Emily in Naomi's house, looking at her girlfriend's pictures. They are planning a trip to Mexico after college finishes. A package arrives containing a pair of goggles that Naomi has bought for Emily, telling her not to ever forget that she loves her. The couple uses Emily's moped and visits the Fitch house, where Rob Fitch is cleaning out the garage. Emily talks to her mother, Jenna Fitch, who insist they have a conversation about Emily's future. Emily brushes her off, and rides off to college with Naomi.
The police turn up with more questions about Sophia's death, and they are both called in to be interviewed. Their names were listed by the family as close friends of Sophia's, even though they'd never met her. Emily learns that Naomi was dealing MDMA with Cook the night of the suicide and sold some to Sophia to pay for the motorbike goggles she bought Emily.
Behind Naomi's back, Emily visits Sophia's family to find out more about her. She discovers that the Sophia claimed to be best friends with Naomi and Emily. While looking around Sophia's bedroom Emily discovers that Sophia was gay and she finds and takes a wooden box and a university prospectus with a key inside. She leaves and later, when flicking through the prospectus, she finds a photo of Sophia laughing with Naomi. She realises that Naomi did in fact know the dead girl and suspects that she might have cheated on her with Sophia.
Emily interrupts Naomi's class by slamming a picture of Sophia and Naomi taken at the University open day, making the latter walk out of class. The two argue about lying and Naomi admits that she indeed met Sophia at a University open day which she was attending behind Emily's back. She insists they just talked and that nothing had happened between them. Still a bit doubtful, Emily tells her about they key she found and Naomi
believes it is for Sophia's locker at the army base. They go to the army base and open it and inside they find a shrine to Naomi. They discover that Sophia was infatuated with Naomi and Emily makes up with her, having sex with Naomi in an army storage closet.
After a fight with her mother over her sexuality, Emily moves in with Naomi and they seem to have put everything behind them. However, when they go to a party later on, Emily becomes suspicious again when Naomi starts talking to other girls.
At dawn, Emily takes Sophia's wooden box and goes back to the club where Sophia died to meet Sophia's brother to open up the box. Emily believes the box contains evidence that proves Naomi's affair with Sophia. Soon after Sophia's brother arrives, Naomi turns up and asks Emily to forget all about Sophia and Emily tells her that she can't leave it. Sophia's brother runs to roof and Emily follows him. Up on the roof they open the box and find Sophia's sketchbook. Through Sophia's drawings that depict her one day affair with Naomi, Emily finds out that Naomi did in fact cheat on her. A distraught Emily leaves the roof with Naomi crying and calling after her.
Emily talks to her dad about Naomi cheating and her dad tells her that he once cheated on Emily's mum, and that she should not worry as it gets better after its worse. Emily goes back to Naomi's house, reading a note on the front door saying, "I'll do anything". The episode ends with Emily walking through the front door, seemingly following her father's advice.
In Cook, He visits Naomi who tells him they must deal with their guilt over Sophia. Later, He finds Naomi and they talk, bonding over how they both love someone. He tells the police he sold Sophia the MDMA, taking the flak for Naomi. Cook pleads guilty at trial and is imprisoned.
In "Katie", The Fitch’s house is repossessed and they are forced to move in with Naomi and Emily, whose relationship is strained. At a BBQ party, Emily gets drunk and high and makes out with another girl, leading
Naomi to admit to the group she slept with Sophia and sold her drugs.
In JJ, JJ lets Lara meet Naomi and Emily. Upstairs, Emily tells JJ that Lara is using him to get back at her ex. JJ comments on Emily’s relationship and about how she is destroying it by continuing to punish Naomi, who has apologized repeatedly, reducing her to tears.
In Effy, Naomi visits Effy, asking her for advice on Emily. Effy says that Naomi should just imagine that her affair with Sophia never happened.
In Everyone, Naomi (like the rest of the gang) believes Freddie had run away, not being able to deal with Effy's issues. Emily and Naomi's relationship is still on the rocks. Cook brings to Naomi's party his new girlfriend Arcia, who everyone calls "Effy 2.0". Later, she invites everyone for a drink and accidentally calls Arcia "Effy", causing her and Cook to get in argument, with her leaving in a huff. The police then raid Naomi's house after Arcia tells the police were he is hiding. Later, Naomi is confronted with the girl who Emily brought over, who has been crushing on Emily. The girl (who up into that point, Naomi thought was straight) not only hit on Naomi but told her that she wanted Emily as well. After another fight, Emily and Naomi do not talk until they meet at Freddie's shed. Naomi finally reveals her true feelings: that she had always loved Emily but she was scared by the effect Emily had on her, so she tried everything to lessen it. However, she states that she is done running, and presents to her two tickets to travel
to Goa, India after graduation, and thus she and Emily reunite. She is last seen having a great time at the party at Freddie's shed.
[Fire] Years after the the gangs seperation, Naomi has moved to London and sharing a flat with Effy. Naomi expresses her care free nature, having parties and ignoring rent opposed to getting a job, making Effy the provider of the home. Unlike Effy, Naomi is still drinking heavily and still smokes weed. It is revealed over a Skype call that Naomi and Emily are still in a 'long distance'relationship with the later annoyed at time it took for Naomi to call her shouting "where the fuck have you been!?" The conversation end with Emily hanging up, this causes Naomi to become paranoid that Emily will dump her for the "Hot dykes" in New York, Effy reassures her that Emily isn't into hot dykes buy worthless stoners like her, this cheers Naomi up saying that Emily loves her and how she needs to go see her. It is hinted that Naomi has stayed faithful to Emily despite the long distance.
Naomily is arguably considered the most popular romantic pairing in the show's history, with even E4 calling it a "bona-fide phenomenon."
Lesbian-based website AfterEllen.com placed Kathryn Prescott at #26 and Lily Loveless at #29 on their "Hot 100" list for the week of May 14, 2009 for their roles as Emily and Naomi, respectively.