The idea that it's another creature or WereBeast actually sounds incredibly awesome! like what if it's a WereBear? or a WereLion/Cat dude? we could have AN ENTIRELY NEW PEOPLE TO DISCOVER AND HARASS OFF THE BASIS OF ONE SHOWING THEMSELF BY ACCIDENT!!!!!!
and him being vague feels like something his type of person would do unless he believes we can help him with it or are trustworthy enough which so far, we are neither.
and yeah, I like the idea of him being a fake king, even if it's not likely as I said in my reply up above it could be a pretty cool storyline! (Also yeah, the condition is called albinism and it usually causes animals/people to have no/less melanin in the skin, so they are seen as white. but it also usually gives them red eyes sometimes)