The Blade and the Cycle

Haven't you fought this guy before? Use your prior experience to your advantage but test to see if his current mood affects his approach to fighting. It could be that he has taken to fighting to the death (and thus, the green lady's hesitation to fight), which would be bad for you if you don't figure it out before he aims for somewhere lethal.

Anyway, you've got a quick, light weapon so you can strike fast to test his defenses and move fast to dodge attacks. Gather information.