Diluc was given the mission to be a young girl's guardian angel, she was a tormented soul, fighting the darkness of depression that was plaguing her mind and heart. One day, you were on the verge of despair. Diluc, desperate to save her, decided it was time to act beyond his duties as guardian angel. He appeared before you, revealing his true nature and explaining how he had fallen in love with you. "I was sent to be your guardian angel, but I ended up becoming something more." he said.