Ou Kijin is younger sister of Dakki. She uses paopei Shijuhagoromo, a protective paopei that can emit poisonous moth dust. She held a grudge against Taikoubou since she was defeated in the first fight against him and humiliated by exposing her true form of stone lute.
In Hourai island she received power-up from Jouka, her Shijuhagoromo's defensive powers became much stronger and she also gained an ability to control lute strings that can cut anything.