maybe because her character is so flimsy/wishy-washy that I had to look for character relationships to define her character. like her questionable intimacy with Ain, BUT it's not at all questionable. I just can't relate to the protagonist and it hasn't been conveyed so far. out of comic strips, her behavior is admirable BUT Ain's thought process is spelled out loud and clear but the protagonist's thoughts are always concern over someone else, doesn't she get tired, doesn't she want to explore? if transmigration was all she needed to have a personality change, just give her amnesia with a dose of "extra memories" so that she has existential crisises BC that would be be a good supplement to the over-arching "family bonding w/a new face"
Don't get me wrong, I love the Duke's and Ain's development, but heck even the prince, the king, and "heroine" character seems more interesting than the protagonist! would it kill to have limelight on all the characters?