Yuta Okkotsu witnessed Rika Orimoto's fatal traffic accident during childhood, an event causing significant trauma. Unable to accept her death and their marriage promise, Yuta inadvertently cursed Rika, transforming her into a Special Grade Vengeful Cursed Spirit bound to him. For years, Rika protected Yuta by attacking his bullies, resulting in his intense guilt and self-imposed isolation to prevent further harm. This situation drew jujutsu society's attention, leading to a death sentence. Satoru Gojo intervened, enrolling Yuta at Tokyo Jujutsu High instead. Characterized by extreme timidity and social anxiety, Yuta exhibited low self-confidence and visible stress indicators like dark eye circles. Early interactions with classmates Maki Zenin, Toge Inumaki, and Panda were strained, particularly with Toge due to communication difficulties. Maki openly criticized Yuta's lack of direction and passive approach, challenging him to develop resolve. Through missions and training, Yuta gradually formed bonds with his peers, gaining confidence. His primary motivation became controlling Rika's power to free her spirit while protecting others. Yuta demonstrated rapid growth in jujutsu capabilities. Initially reliant on Rika's autonomous protection, he learned conscious summoning during a mission with Maki's encouragement. Gojo provided a katana to channel cursed energy, though Yuta's initial lack of control destroyed it. Training under Maki improved his swordsmanship and combat skills, while missions with Toge honed tactical awareness. During the Goodwill Event, he single-handedly defeated Kyoto students including Aoi Todo. Gojo noted his exceptional potential as one of few who could eventually match or surpass his power. The confrontation with Suguru Geto during the Night Parade of a Hundred Demons revealed Yuta's capacity for profound rage when friends were harmed. He fully manifested Rika's power through a binding vow sacrificing his life force, overpowering Geto's Maximum Uzumaki technique. This act also broke Rika's curse, as Gojo later explained the spirit originated from Yuta's own immense cursed energy as a descendant of Michizane Sugawara. Yuta accepted this revelation, freeing Rika's spirit after mutual expressions of love. Following these events, Yuta trained overseas in Africa with Miguel. Upon returning after the Shibuya Incident, he displayed a colder demeanor, claiming intent to execute Yuji Itadori for severing Toge's arm. This proved a ruse to fulfill Gojo's request to protect Yuji from higher-ups, as Yuta secretly healed him while sympathizing with his similar predicament. He joined efforts to rescue Tsumiki Fushiguro from the Culling Game, taking responsibility to accumulate points by eliminating dangerous sorcerers like Dhruv Lakdawalla while protecting civilians trapped in colonies. Yuta possesses vast cursed energy reserves exceeding even Gojo's, amplified through connection to Rika, who manifests as external storage for techniques and tools. His innate Copy technique allows replicating abilities like Inumaki's Cursed Speech or Uro Takako's sky manipulation, typically requiring conditions such as Rika consuming a target's body part. He wields Reverse Cursed Technique for healing and exorcism, though energy demands limit prolonged use. His Domain Expansion, "Authentic Mutual Love," creates a space filled with technique-imbued swords guaranteeing hits through random selection. During Shinjuku Showdown preparations, Yuta proposed possessing Gojo's body using Kenjaku's technique if needed against Sukuna. Following Gojo's defeat, Yuta executed this plan by eliminating Kenjaku and having Rika copy the body-swapping technique, demonstrating his willingness to employ morally questionable methods for greater objectives. Current events involve his controlled confrontation with Sukuna while inhabiting Gojo's form. Yuta's moral framework centers on protecting cherished people, justifying lethal force against threats while attempting dialogue with less hostile opponents like Uro and Ryu. He expresses guilt over past failures against Geto and during Shibuya, driving his resolve to shoulder burdens independently. His character arc reflects ongoing tension between self-sacrificial tendencies and hard-earned confidence in relationships and abilities.