Anna finds out that she's a changeling! What does she do about it? She gives up her normal training and decides to cook (somewhat relevant, if only as a backdrop) and learn other magic instead (basically irrelevant). Does she tell anyone that could help? Nope. Does she tell anyone that she trusts? Nope. She just agonizes over it while doing very little else, causing her problems down the road.

Anna is struggling to get along with her bio family! Does she do anything to try to get along with them? Not really, but the story just goes along as if she did. They just sort of magically get together, even her dad who appears out of nowhere Anna basically forgives in the span of like a single day (she says she doesn't forgive him, but her actions show otherwise). Anna causes friction with her family, but doesn't do anything to help and everything just works out on its own without her.

Anna's friend Sara is looking/waiting for her childhood friend! Anna runs into someone from Sara's hometown who says he's looking for someone. What does Anna do? Literally nothing. Doesn't even tell Sara. It's not till he stumbles in months later sick and dying that Sara finds out that Anna even met her childhood friend.

Anna finds out that there's something shady and dangerous that her friends are involved in! Does Anna tell them? Nope, resulting in them nearly getting killed. She just got lucky that Rock was actually competent and could think well despite still recovering from illness so he avoided problems that he didn't even know about.

Anna's friends are going on a dangerous mission! Anna is told not to do anything because she sucks. So she does nothing. Everything goes smoothly as a result.

Ed clearly loves Anna and is searching for a way to be with her! Ed tells Anna that he's currently fake engaged to Annette to fend off engagements. He tells her that he's got a plan and that he just needs more time. What does Anna do? She tells him to just get married to Annette and lies that she has her own engagement. Then spends a lot of time moping around doing nothing, because that's what she's best at.

Even at the end, she has no hand in her engagement with Ed. Ed does everything by himself, off screen. He becomes a lower ranking noble, taking one of his father's titles, which allows him to marry Anna. Anna does... absolutely nothing, believing that Ed is going to marry Annette right up until he appears and proposes to her. It's depressing how little she had to do with her own marriage in the story's climax.

Anna basically spends most of the story doing absolutely nothing. Things fall into her lap and others around her accomplish things, but all she does is cause problems and hold everyone else back. She's not smart, she's not proactive, she's not even reactive. She's just there. The most action she got was when she knocked her dad down because she mistakenly thought he was a robber, which honestly just caused more problems for her family. Isn't it sad when the main character of the story accomplishes the most just sitting there looking pretty?