I know theres some thread about Rakshas that I have yet to read, but I never did get the whole thing about him being some other character in disguise. Simply feels so not-Berserk. It was a while since I re-read Berserk now but I think they mention that it is a mask somewhere, even so, I´ve always liked to think that its actually his face for some reason or e.g. kinda how you´d say SK´s helmet/visor would be his face, I guess thats a different thing though so I wouldnt have a clue how to explain the specs here, but thats been my interpretation anyway.