[Snake]

Katana Master should probably have a check that updates the buff every round to fix a small oversight that's thanks to how battles work. The condition "At the start of the battle, [...]" does not count if you join after a battle starts. (Making cases where you're trying to rescue a friend inside a BDP quite unfortunate, as you'll be severely weakened.)

So I suggest this being changed to "Every round, if you have only Katana weapons equipped."

Furthermore, I'd like it to rival Vent Petale, for being so restrictive as said over and over on another thread. Can the buff double the stat bonuses to Peerless? (Effectively making Katana Master also grant +3 STR/SKI while active.), and also reduce the cost of Sheath Sword to 1M?