Phantom of the Eclipse - AoT Fanfic.

"The world was swallowed by darkness, freedom stolen by the grasp of the devil."

Elsie Kirsten, a girl who only wishes to follow the footsteps of her father, became dreadfully aware that mankind will lose all hope to the titans after the fall of Shiganshina, her hometown. She lost her mother to the beasts, and had no family left. The only way she could avenge her family was becoming a soldier herself, and soon discovers many secrets hidden from her.

Meeting Eren Jaeger, a determined soldier, she realises the these two were connected somehow, and all of this gets unravelled as she travels through her adventure.... and soon they are inseperable and eager to know the truth - wanting to know the secrets behind just one key and one locket.