I realized the other day that I had no female characters who were competent fighters. All of the girls I have fulfilled niches that had no physical conflict involved in them whatsoever. So I decided to make a ninja character, to compliment my samurai.
Tsuki is generally an agreeable sort of Ryuma, but she's got some grand ideals about getting vengeance against the Imperial Dynasty for 'destroying' her family's way of life, way back when her ancestors migrated from Long Guo after its unification. She'll be using her ninja training to try and subtly sabotage any Long Guo workings she can.
...We'll see how that goes for her.