AU: Sunny inherits animus magic, and develops thrice-moon-born powers, having the same abilities as Darkstalker.

Sunny certainly didn't mean to hurt anyone; the only reason why she did the things she did, at first, was because the minders told her you're going to help a lot of dragons if you do what we say. She thought she was doing something good, something heroic when she murdered her first dragon -- and the minders were happy, and happy minders were a lot more enjoyable than angry minders.

So when Kestrel and Morrowseer told her to kill her brother, Starflight, she did so willingly.

Years of physical and psychological abuse had her convinced that the right way was the minders' way, and she found herself priority number one in their book. She was no longer one of the dragonets they were in charge of caring for - she was their pet project.

Convinced she needed to gain weight to be a proper adversary, they force-fed her daily. Curious of what she could do, they ran cruel experiments on her. Determined to instill obedience, they violently abused her when she refused to cooperate. The minders knew what she was capable of if she agreed to it - she could level Pyrrhia, just as easily as she could slaughter each of them if she got too independent. Controlling the most powerful dragon around meant destroying her sense of self.

They turned her into a weapon of mass destruction.

After a tumultuous conclusion to the war, dragons cycled in and out of her life. She was painfully indifferent to all, until she met one dragon claiming to be her mother. Annoyed and threatened by her presence, Blister slaughtered her before Sunny could connect. In retaliation, Sunny began cursing dragons by the dozens to - quite literally - drop dead around her.

Realizing they could control her no longer, Blister and Morrowseer relinquished her from her duties. She first went back to her surviving siblings, who aggressively rejected her, still haunted by the sight of her killing their brother. She couldn't go back to the rainforest, nor to the desert, and she sure couldn't find any dragon who could tolerate her presence; she had gained a terrible, frightful reputation during the war. The freedom gave her space to process her trauma, and to claw her way out of dissociation long enough to begin to understand the magnitude of what she had done.

She travelled back to the old home of the Nightwings, abandoned after the eruption, and erected a spiraling tower of ash and obsidian on the center of the island. She chained herself to the top floor (a symbolic act more than anything, considering her powers) and spent years contemplating the horrors she had commit in the name of being a hero.

After everything she had done, she knew the most heroic thing she could do was seal herself away forever.