I don’t remember completely why I thought that, I’ve been reading too many series in the past month it’s all jumbled up lol. If memory serves me correctly, I thought this before I read the part where she ate the gem that gave her the ability to go back each time she died. Prior to that scene I thought that it may be part of the royal family gift/curse. And since she’s an orphan, her past is a mystery even to herself, leaving room for the author to make such claim.

This is just my speculation, no spoiler or anything, but perhaps, Julia is actually a lost princess from the main kingdom, the bigger one, where our black hair blue eyes captain serves?