Concepts for steel helmets for my angels who have large pointy ears!
Yeah, so. Silly ears means different helmets.

The allowance for the ears means that there is a bit more area that can be hit, but steel helmets were mostly created for trench warfare where most danger comes from above, so that's not of that much concern. (And when you can shoot them in the ear you can shoot them in the face anyway.)

And two different gasmasks because why the hell not.

I am thinking about helmets for horned demons, but so far they are out of luck.