Korra did not like Asami when she first met her because she was dating Mako whom Korra had a crush on. Despite them being in a relationship, Korra still decided to pursue Mako anyway. Eventually, Asami invited Korra over to her mansion and took her driving. Korra finally began to like Asami and admitted that she misjudged her. Asami's father Hiroshi was revealed to be an Equalist so Korra invited her to come live on Air Temple Island.
Eventually, Asami learned of the feelings between Mako and Korra and began to distrust the former. This eventually led to their breakup. However, Asami was never upset with Korra about her relationship problems. In fact, Asami offered Korra support and helped her in her fight against the Equalists. She also continued to support Korra during the Water Tribe Civil War and the Unalaq crisis.
Two weeks following Harmonic Convergence, Korra and Asami seem to have grown closer. Asami teaches Korra how to drive and they both talk about their past relationships with Mako. Both are done with him for good and laugh everything off. Korra is glad that Mako never came between them. Asami later accompanies Korra to the Earth Kingdom while searching for new airbenders. Zaheer and the Red Lotus make multiple attempts to capture Korra. At one point, Asami tries to escape with an unconscious Korra who is in the Spirit World but they are captured by the earth queen's forces.
Asami eventually helps Korra escape from the airship where they are being held as prisoners. Korra later finds out that the Red Lotus is planning to wipe out the new Air Nation unless Korra turns herself in. When Korra decides to do so, Asami protests and refuses to sit by while Zaheer takes her. However, Korra has already made up her mind, so Asami hugs her goodbye. Korra is eventually poisoned and almost killed by the Red Lotus. Asami clasps her hands and watches in worry as Korra is saved. Weeks later, Asami helps Korra get ready for Jinora's mastery ceremony as the latter is confined to a wheelchair. Asami can tell that Korra is feeling depressed and holds her hand, telling Korra that she is there for her. Korra eventually leaves for the south pole and Asami offers to go with her, but Korra assures her that she will only be gone for a few weeks.
Korra ends up being gone for three years. Asami writes letters to Korra about how much she misses her and that Republic City is not the same without her. Korra initially does not write to anybody because she does not know what to say but eventually writes back to Asami after two years. Korra confides in Asami about her inability to enter the avatar state and the fact that she is still having visions of Zaheer. Asami is excited to finally see Korra when she hears that she is arriving in Republic City, but Korra does not show up.
Korra eventually returns to Republic City and reunites with Asami. They embrace and Asami compliments Korra hair which makes her blush. Korra, in turn, comments that Asami is looking snazzy. Asami initially gets angry at Korra when the latter shows concern over her seeing her father again and snaps at her for being gone for three years. However, they eventually apologize to each other. After the final battle, Korra and Asami talk one-on-one at Varrick and Zhu Li's wedding. Korra apologizes to Asami for being gone but Asami is just glad that she did not lose Korra as she already lost her father. Korra comforts Asami and the two decide to take a vacation together to the Spirit World. As they are walking through the portal, the two smile at each other, hold hands, and gaze into each other's eyes. This marks the beginning of their romantic relationship.
Korrasami became increasingly popular throughout Book One and even won a Tumblr poll as the most popular ship after Book One. As Books Three and Four progressed, many fans grew hopeful that Korrasami might become canon, but others were doubtful that Nickelodeon would allow a same-sex relationship. However, when Korra and Asami smiled at each other and held hands at the end of the series, many fans concluded the relationship to be canon, including many who did not even ship Korrasami. However, some fans were still in denial and claimed that the moment just signified a close friendship. Three days after the finale aired, Bryan and Mike both posted on Tumblr and confirmed that their relationship was indeed romantic.
- Korra and Asami are the first same-sex couple in the history of Nickelodeon.
- Bryan Konietzko claims to be the first ever Korrasami shipper and has been shipping it since 2010.
- The manner in which Korra and Asami held hands and gazed into each other's eyes at the end of the series was meant to mirror Varrick and Zhu Li's nuptial pose.
- Comics are currently in the works that will dive into their relationship more.