Okay so this is actually a non Tomione one.
It's a Prince Hans x Princess Anna canon compliant frozen sequel (written before the actual frozen sequel was released but i only finished it way, way after). I feel like I was a bad influence on the Hanna fandom cause so many people were into cute redemption stories and I was like... Power Hungry Kingslayer and a fellow lonely soul, here is how he can torment her!!!!!
Anyway, through dark magic he controlls her like a puppet. The name is A Puppeter's song. I wonder why disney chose to go in a different direction...
“You have more freckles than I remembered,” he said conversationally, as if they were old friends catching up.
She knew better than to ask for what he wanted. She recalled all their exchanges now.
A throne. Control. I want my brothers to kneel before me. I want you and your precious little sister to lick the floor I walk on. I want power, my dear, dear, Anna, and I want revenge.
His cruel words echoed in her brain, yet he kept caressing her in a way that was almost- nice.
She had to stop that, whatever that was.
“I thought your brothers had forbidden you from attending royal affairs,” she said timidly, inches away from his lips.
A single finger tilted her chin up.
“Now don’t get all coy on my account, Princess Anna.” he smirked. “Where is that rebellious spark I have missed so very much?”
A flicker of irritation flared through her eyes. “When criminals dabble in ancient dark magic, the people around them tend to get a little wary,” she stated matter-of-factly.