Hi, sry for my late answer
I hope you don't mind.

Hm, i don't know, the shadow on her nose, could be.
I think it's the forehead or the position of her face. (from the side)
Maybe a other face of Sailor Mars?
But for all that... a nice work!

greetz
Malfi^^

But a small point of criticism, Sailor Mars looks strange^^"

how so? is it the "shadow" on her nose? cuz i feel that kinda makes her look odd. maybe i should've used the burn tool instead.