Osohe Ghost (Mother 3) sheet & portrait

It's solid work, all of the sprite page is consistant, fluid.

Only suggestion is, now granted I don't know the character or the source, so your work might be 100% true. With that in mind, I think it could be improved with a little shading in the sprite. Not so much like the vanila FF6 ghost, but just a little, similar to how the portrait is, to make it look less flat.

Again, I don't know the base character, for that matter, the way it is may fit better your purpose. Just a general suggestion.