Shes A Demon at Dusk by Cycle-Alchemist

When a young soldier named Alphonse Senyon escapes from the General who stole him away from his family and finds a genus young girl Onex Silver who has lost her memory but remains smart and doesn't understand how she is.
Alphonse has no other choice but to follow her out of the war and keep his promise to help retrieve her lost memories... Only with her can he leave the war safely.
Darker nights 2 .Blood Of the Forgotten will be coming soon! For ages 16^up

first of 6.
Playing as: Alphonse, Alex, Onex and Ms. Silver