Tsumiki Fushiguro

Tsumiki is kind, patient, responsible, and guided by a straightforward belief that people should avoid hurting others. Megumi Fushiguro remembers her as someone who tries to behave morally even when there is no reward for doing so.

Her outlook initially frustrates the younger Megumi. As a child, he considers her goodness simplistic and resents being lectured when he fights delinquents. Tsumiki nevertheless continues treating him with patience rather than responding to his hostility in kind.

Megumi's later understanding of justice is heavily shaped by her. He comes to distinguish between people he believes deserve the opportunity to live good lives and those who deliberately harm others, with Tsumiki serving as his clearest example of an undeservedly suffering good person.

Her importance therefore extends far beyond her amount of direct screen time. Many of Megumi's choices become easier to understand once his desire for Tsumiki to experience an ordinary, happy life is taken into account.

Tsumiki is initially presented as an ordinary human with no jujutsu education, combat training, or known cursed technique.

She becomes connected to a supernatural phenomenon after visiting Yasohachi Bridge with classmates. The bridge is associated with a curse triggered by people who pass beneath it at night, though Megumi initially does not know what has caused Tsumiki's condition.

Tsumiki is later identified as one of the people marked by Kenjaku in preparation for the Culling Game. Unlike newly awakened modern sorcerers, however, her body has actually been prepared as a vessel for an incarnated ancient sorcerer.

The cursed technique later displayed through Tsumiki's body is Construction, but it belongs to Yorozu rather than Tsumiki herself. Canon never establishes Tsumiki possessing or consciously using an innate technique of her own.

Tsumiki appears primarily through Megumi's memories during the early story. Their parents form a blended family and subsequently disappear from the children's lives, leaving Megumi and Tsumiki effectively dependent on one another.

Satoru Gojou intervenes after meeting Megumi and prevents him from being transferred into the Zenin clan, helping establish financial support for the siblings while Megumi eventually enters jujutsu society.

Tsumiki later visits Yasohachi Bridge with other students. She subsequently falls into an unexplained coma, while other people connected to the bridge begin experiencing supernatural attacks. Megumi's investigation of the curse becomes personally urgent when he realizes Tsumiki is among those marked by it.

After the Shibuya Incident, Tsumiki awakens as Kenjaku activates the people he prepared for the Culling Game. Megumi enters the game partly to secure enough points to create a rule allowing Tsumiki to escape forced participation.

When Megumi finally reaches her, the person controlling Tsumiki's body reveals herself as Yorozu, an incarnated sorcerer from the Heian era. Tsumiki herself had never awakened as a modern sorcerer; Yorozu had been using her body as a vessel.

After Sukuna takes Megumi's body, Yorozu deliberately seeks him out. Sukuna kills Yorozu while using Megumi's Ten Shadows Technique, which also results in Tsumiki's death and is deliberately used to drive Megumi's soul deeper into despair.

Megumi Fushiguro is Tsumiki's younger stepbrother. Her kindness becomes one of the strongest influences on his moral outlook, and protecting her motivates his participation in the Culling Game.

Toji Fushiguro becomes Tsumiki's stepfather through his relationship with her mother, although the parents subsequently disappear from the children's lives.

Tsumiki's Mother is her biological mother and Megumi's stepmother. She and Toji form the blended household from which Megumi and Tsumiki become siblings.

Satoru Gojou intervenes in Megumi's future and helps establish arrangements that allow the children to avoid being absorbed into the Zenin clan's plans for Megumi.

Yuuji Itadori and Yuuta Okkotsu later help Megumi pursue a Culling Game strategy designed partly around rescuing Tsumiki.

Kenjaku marks Tsumiki as part of the preparations for the Culling Game and turns her body into a vessel for an incarnated ancient sorcerer.

Yorozu is the Heian-era sorcerer incarnated in Tsumiki's body, whose identity is initially concealed from Megumi and his allies.

Ryomen Sukuna uses the confrontation with Yorozu as part of his effort to destroy Megumi's resistance after taking control of his body.