Responses
Luca himself hasnt said anything yet about his situation to his aunt when hes confronted. so, I said its subtly shown.
but in much earlier ep, its written that Winterwald has a heirloom which granted every wish. so, from the spoiler I read, Luca used the heirloom after he reach the of the og story and wanted to make everything right, started with protecting his aunt, his only family.

I've thought from the beginning that Luca is an adult in a kids body who knows the story.. or was Luca before and gone through it once before. He is probably judging the ML by the past/alternate story.
I feel like the FL, since she knows this story, even tho it's changed so much, should be able to maneuver better than she does. I love the art in this so much, better than the story actually.