Nagi Sayuri

Separated by Blue Lock's grueling trials, Nagi Seishiro and his inseparable twin sister Sayuri are finally reunited at the U-20 match, where their intensely close bond will be tested under the blinding stadium lights.

When distance proves unbearable, Nagi Seishiro's twin sister uses her family's influence to infiltrate Blue Lock, blurring the lines of sibling devotion.