The Wayfaring Wordhack

The Spivak pronouns are a little weird, but if you established them as part of the world, people would probably come to accept them, if the rest of the story was worth the effort. I'm reading a book called A Madness of Angels right now in which an individual body sharing more than one entity alternately refers to himself as me and we or us, but that wouldn't necessarily help you. You could, however, perhaps, figure out a way to alternate it with another personal pronoun to help ground the reader, using it in ways that give hints as to what it's trying to convey. An example, only you'll do better: "The High Fravardin trailed its fingers over each mask, lingering on the curve of the girl’s cheek. It had carved and tinted it eyself, working from the memory that, Ijad willing, would be expelled today. If only ey had enough time the High Fravardin might work miracles, but time was not on its side, or on the side of the Fravardin eirselves." Er, well, yanno, whatever. Maybe that's not so skillful, but...