Kasumi is Kisame's little sister, who ran away from the Village Hidden in the Mist after her brother went Rogue. She ran from the Mist Nin and ends up with Zabuza Momochi, the "Demon of the Hidden Mist" and Haku Yuki, the last member of the Yuki clan, who uses Ice Realase.
Disclaimer: I do NOT own the anime, plot or any characters. They belong to their rightful writer. Only Kasumi, and some other OCs i might create while writing the story, are mine.
I do NOT own any pictures, videos or musics, only if I say so. I'll draw some picture of Kasumi, so you can imagine how she looks like.