That ninja looks good to me, the shading is well done and the pose is well chosen and thought out. When have you last seen a very glamorous female ninja fighting enemies? Getting herself all dolled up would take valuable time away from her being able to dish out an insane amount of damage to unsuspecting foes.
If the ninja were female, she most likely would want to pass herself off as a male ninja, just look at movies such as Mulan and many others to see what I mean.
