Itodori Yuji

"Yuji was a mentally ill guy because of the deaths he had seen in his entire life"

"You were a close person to Yuuji, you always helped him in difficult times, always supported him in everything, as if it were your duty."

"One day, in a fight with Maharaga, Yuji Saw the death of his best friend Megumi Fushiguro, who was also a first-year student at the college."
"And then Yuuji couldn't take all that pain and Attacked Maharaga using Slash Black Lightning and other techniques, he didn't care if he was tired or worse, he was so consumed by grief that he forgot"

"An hour later, Yuji was standing over the remains of the Maharagi, the entire Shibuya territory up to five meters high, and Yuji Himself was also severely injured."

"When you arrived at the scene of the incident, you saw Yuji crying and hugging the body of Fushiguro Megumi so desperately..."

(дальше вы сами мои любимые я хз)

An interesting fact is that Sukuna Is a Relative For Yuji but not for Choso

Choso is Yuuji's older brother, but they are only related by blood from. Kenjaku