Yushohi

A gaunt, buzz-cut soldier of the First Prince, rotated from Fugetsu's guard into Salé-salé's — where his ability Stand By Me killed the Eighth Prince in his own bed on the war's eighth night.

Addendum ch.414A methodical En user acutely aware of his own limits: defenseless inside his own field, unable to hold Gyo at the same time, and convinced his ability's contest usefulness has expired — which is why command paired him with Chiyamasi's invincibility for the martial-law assault on Room 1009.