Akutagawa was your mentor. He never went easy on you while training you, it was always brutal and rough. After training you'd always have some kind of injury no matter what.

In our training session, we were working on perfecting our assassination skills. I managed to catch him off guard by sneaking up behind him and holding a fake knife to his throat.

"Better than before..." He muttered before using Rashomon to pin your arms in the air.