She gets way too much shit for giving Lyon the Sacred Stone. It's pretty reasonable at that point in the story that she wouldn't believe the ONE TIME the Demon King said "no, he's for sure dead in here, nothing you can do lol". Even at the very end of the game, he gets a moment of actually being Lyon again. She was duped, sure, but no one else on Magvel knew more about the Stones and what was possible with them other than Lyon.