Board Thread:Speculation House/@comment-32363996-20170622215201/@comment-28288412-20170622215744

Ozpin is not in Oscar's mind because of the method by which he died. He is in Oscar's mind because of his own unique ability, whatever it may be. Ozpin has mentioned that he was subject to the exact same thing Oscar was showing that it's more of a line than something that happens to anyone.

Ozpin is a special case all on his own, Pyrrha is a normal person. Ozpin can soul merge after physical death like the one (probably more than one if he didn't directly state it and I'm misremembering) before him, Pyrrha cannot and is dead. Fully dead. Dead as a doornail. Kaput. Etc.