Single heroine: Pieck, with some original character details.
She dug a boy who had been asleep for two thousand years out of a crystal coffin.
When he opened his eyes, the first thing he did was stop the blood running down her cheek.
On the run, she gave him her only coat, shivering in the cold herself. The first time he used his power, it wasn’t to fight. He built a wall to shield her from the snow.
She taught him to speak. The first complete sentence he learned was: “You protect me, and I’ll protect you.”
The day they reached the land within the Walls, he looked into her eyes and changed one word:
“I’ll protect you. For the rest of my life.”
She smiled and ruffled his hair. “Learn how to start a fire first.”
During their two peaceful years, all he wanted was to be an ordinary person: to wake up and see her every day, and hear her breathing before he fell asleep each night.
Until that day, when the Colossal Titan’s hand came to rest on the city wall.
Looking at the city gate that had been kicked to pieces, he understood for the first time:
The peace his big sister had waited two thousand years for but never found, he would carve out with his own hands.
For her.
