Water, sound, and fire mix well together<3(Rengoku, Tengen, tomioka x Reader)

You were a 20 year old woman, you were a demon slayer with your own type of breathing technique. Lava breathing, people mistake it to fire, or sun breathing. Of course sun breathing is the strongest, you have no idea how strong your breathing technique is but you by yourself have made 7 diffrent forms of it.

One day you were fighting 4 lower moons all by yourself.....