The sky. Morning. Wind. Birdsong. Two graves.
20 years ago (in 1966) her sisters died. Rebeka is still grieving. She doesn't understand how it could have happened, and she still can't find an answer. She has only found one name in the entire investigation. Spectre.

(Sekiro66: As I understand her, many of us have lost someone we love... The main thing is to remember these people so that they live forever in our hearts)