at first I wasn't convinced but I saw it in work with the model. It's not too flashy I think the frontal helmet colors like the red and black look a little too soft, but I really do appreciate the style you're going for and it works pretty well with the frame.

The dual eye slots could serve to be maybe a little bit wider so they're noticable, the glowing points could maybe be more defined.

You did the horns well without them being over the top or edgelord branching out into another set of horns.

The oni-samurai style you're going for works, just soften the colors on the tail and make the colors on the actual helmet more enriched, just a tad though, too much and it gets that neon tokyo vibe, which at that point wouldn't work well with the helmet.

All in all, this is great, I hope this gets added, if not, just try touching up on a few of the things I mentioned if you agree.