That "cutting off your whole ass face the moment your identity is found out" move is actually balls to the wall crazy, but im 1000% here for it since GK is already crazy... we found out that noppera-bou had no face right at the very beginning, and the reveal that he did that shit to himself is...
Take notes! This is the first time benimaru has done literally anything in, like, dozens of chapters! He's got a cool design but with so many other characters in this story, he really hasnt had a chance to shine in ages