Q1: Did Sukuna's death also kill Megumi?
No. Yuji's divergent soul-targeting attacks specifically struck the suture seam separating Sukuna’s soul from Megumi’s physical body. When Sukuna dissipated into dust, Megumi remained intact.
Q2: Can Megumi still use Mahoraga after the final battle?
No. Mahoraga was permanently obliterated when Satoru Gojo detonated his maximum output Hollow Purple in Shinjuku. Because of the rules governing the Ten Shadows Technique, Mahoraga cannot be re-summoned.
Q3: Did Megumi suffer permanent brain damage from Unlimited Void?
While Sukuna used Megumi's soul to bear the brunt of Gojo's domain, the manga shows Megumi fully conscious, coherent, and mentally sound by Chapter 269. The long-term physiological side effects were either healed by high-level reverse cursed technique or mitigated once Sukuna left his host.
Q4: What was the main reason Megumi stopped wanting to live?
Sukuna forced Megumi’s body to execute Tsumiki Fushiguro, who was possessed by Yorozu. Megumi entered jujutsu society solely to protect Tsumiki and guarantee her safety; her death eliminated his primary reason for living.