Laura is acting too much like the character's current age, it's like she has no common sense. There's a grown up in that body, for alchemy's sake! Even disregarding her presumptuous insistence that she'll be abandoned by Luca later, she's an idiot. Disregarding the clear and solid evidence she witnessed before her eyes that this ISN'T the same game world she memorized so thoroughly, meaning the plot hole of the original game - Laura's disappearance from the story and Luka's heart - is very obviously not an event set in stone, she's still an idiot.
There's a grown woman in that little body; why is she acting so cute and clumsy, essentially being manipulative and psychologically abusive to a little boy (who has currently done absolutely nothing wrong, and probably never would have) whom she most certainly should not currently be having feelings for?