How exactly are Gojo and Yuta related, and what role does their ancestor, Sugawara, play in Jujutsu Kaisen’s story?

Although he may be considered Jujutsu Kaisen's strongest sorcerer, Gojo Satoru's character arc contains one unfortunate and detrimental flaw.

Gojo was trapped within the mysterious Prison Realm by the supposed Suguru Geto, and Yuji and the other Jujutsu Sorcerers were then left to face off against the Cursed Spirit threats all by ...