This tough girl (which by the way gave some hard time drawing her, lol) is Yui Rakkuza, an Original Character (OC) made by *jadenkaiba
I wanted to try to draw her soon after I read "School fight" the manga which she takes place, also made by JadenKaiba.
Hope you like my gift Kaiba! ^_^

Yui belongs to *jadenkaiba
Art: by ~MelanAnime