tiny pointy face.
pointy will always make it look like a :> face, even with angry eyes.
tiny gives you less space to work with.
if you want to make it look like shes deep inside the helmet, create real depth, dont just make her face small.
you could keep the face regular size and make the helmet thing look bigger. its not really that difficult.
angry eyes have less to do with the eyes, and more to do with the area around the eyes, the brow shape.
generic anime eyes are not going to cut it.
if you cant tell the difference between what you're drawing and your reference, youve got a lot of work to do.