When I first tiered up Aunamee, I ignored both the major and minor body modifications because I couldn't think of anything.

I know in the past, we've allowed people to add powers retroactively. Is this also the case for body modifications?

If so, I'd like to turn his skull into a pile of floating glass that can double as his helm like so. The glass would be able to shift and float, but it wouldn't be capable of attacking anyone and it could still feel pain. Specific pieces of glass would be responsible for his sight and hearing, but they'd look indistinguishable from the other pieces.

Is that an acceptable functional body mod?