AU Idea: Hans is Anna’s twin.
//I saw this nifty au with Kristoff as Elsa’s brother, and I thought, well, what if Hans and Anna were twins, Elsa’s little brother and sister?
In this AU, Hans knows about Elsa’s powers, because his memories weren’t altered when Anna’s head was struck with ice. Because of this, Elsa still talks to Hans after she shuts everyone else out, and their parents trust him to look after her when they go away.
Anna, meanwhile, takes Elsa’s silence very personally, because she doesn’t understand why Elsa would only talk to Hans. Anna grows up very close to her twin brother, and clings to him a lot. He’s literally her only friend, and Elsa envies their relationship.
Hans, though… He doesn’t show it, but he really hates keeping Elsa’s secret, and constantly lying to Anna about it. He may even see Elsa as something of a burden, since he has to take care of her all the time.
When Elsa strikes Anna in the heart with ice, Hans finally snaps. He locks Elsa in the secret prison their father built, and decides to take the throne for himself. Maybe the power of love finally brings the three siblings together, or maybe it ends tragically for all of them…