Attack on Titan: Beneath the Surface

Everyone believed Grisha Yeager had only one child.

They were wrong.

Years before Eren was born, Grisha made the impossible choice. To protect his first daughter from enemies tied to his past, he entrusted her to someone who promised to hide her where no one would ever look-the Underground City.

But promises are easily broken.

The little girl was abandoned and left to survive in the cruel depths beneath the capital, where kindness was a weakness and every day was a battle to stay alive.

When death seemed inevitable, a notorious killer named Kenny Ackerman found her.

Instead of leaving her behind, Kenny saw something different in the frightened child-a fire that refused to die.

He taught her everything.

How to fight.

How to read people.

How to survive.

How to kill.

Years passed, transforming the abandoned girl into one of the Underground's deadliest fighters. Calm, patient, intelligent, and terrifying when provoked, she earned the nickname...

"The Underground Ghost."

Eventually, Commander Erwin Smith discovered her existence and offered her something she'd never had before.

A purpose.

She joined the Survey Corps, quickly rising through the ranks until she became one of humanity's strongest squad leaders.

There she met humanity's strongest soldier...

Levi Ackerman.

Their first meeting was less than friendly. Two warriors raised in the Underground. Two people taught by the same monster.

Neither trusted the other.

But mutual respect slowly became friendship...

Friendship became love...

And together they would face Titans, betrayal, and the truth hidden beyond the walls.

Meanwhile, in Shiganshina, a young boy named Eren Yeager has no idea that his long-lost older sister is still alive...

...or that fate is about to bring them together once again.