- Author's Saving Throw: This book makes it clear that what Hans did was terrible and inexcusable, but it manages to humanize the most well known Base-Breaking Character of Frozen by giving him a clear backstory. It explores his Freudian Excuse, giving Hans has his own standards, and showing him not starting out evil.
- Cry for the Devil: Hans is depicted in a more sympathetic light despite his actions.
- Ensemble Dark Horse: Lars is a minor character who only appears briefly at the beginning of the book, but is well-liked by readers for being the only brother who cared for Hans, and there is art of the character on Tumblr despite no information on what he might look like.
- Esoteric Happy Ending: Because we see the story from the perspective of Prince Hans, the ending, which follows that of the original Frozen film and has Hans sent back home after his plot is exposed, doesn't feel completely happy in this book. Our heroes are completely unaware they just sent him to a living Hell on Earth.
- Fanfic Fuel: Hans' siblings and family life are given more detail here than in any other official media. It's unknown if Disney will deem them canon once Frozen 2 comes out (if they're referenced at all), but many fans don't care if they're semi-canon or not and create much fanwork exploring the Southern Isles and its inhabitants as written in A Frozen Heart.
- Jerkass Woobie: Hans was already considered this in the film due to Word of God confirming his family was awful to him, but this book goes further. Behind his seemingly suave and smug attitude was a young man who wanted to be loved by his abusive father while trying to leave his home for a better life. Unfortunately, years of his father's cruel criticism and most of his brothers bullying him to make their father happy made him too desperate to get what he wants. So much so he decided to become what he hated, and as a result, it's made his life worse with little to no chance of things getting better.
- Moral Event Horizon: The king of the Southern Isles willingly has his other sons torment Hans, seeing his youngest son as a "weakling" who needed to be "toughened up" through violent and cruel means.
- Rescued from the Scrappy Heap: While Hans is still a major Base-Breaking Character, A Frozen Heart humanizes him and allows some to see him more of a Jerkass Woobie than just a one-dimensional villain.
- The Scrappy: While Hans's father is supposed to be hated, the fact that he not only gets off scot-free but also continues his tyranny against his family and subjects still rubbed quite a few readers the wrong way.
- The Woobie: The Queen of the Southern Isles. Her husband is an emotionally abusive sociopath who turned most of their children into his devoted enforcers, while she was forced to watch them torment their youngest to fit their father's standards. She's unable to do anything but give small smiles to Hans as he's mocked and ridiculed his whole life. Worse still, nobody knows how she reacted to news of her youngest son's crimes.
YMMV / A Frozen Heart