Cameron Adams’s Reviews > Jujutsu Kaisen, Vol. 17 > Status Update

Maki Zenin (Side story) was abused and mistreated in the Zenin clan for being weak, a girl, and couldn't see curses. She has to be weak, because she shares her power with her twin sister. She could never reach her full potential with her sister around. Maki's sister sacrifices her self so Maki could reach her full strength. Her sisters final wish is for Maki to destroy everything. She wipes out the entire Zenin clan.