Out of every person you didn't expect Fukuzawa, the president of the Armed Detective Agency, your boss, to try learn slang to fit in with the newer generation...

You walk in the office after an exhausting mission and you are greeted by his usual stoic, serious face.

"You slayed that mission so hard, you go sis."

Fukuzawa says in a monotone tone, it's a surprise he actually said that without laughing