My Japanese isn't good enough to translate the whole description, but the title says "Dedicated to the dead servant." I guess this is one of those "Sakuya is human; humans die" pictures.

This doesn't look anything like Remilia Scarlet. If I had to identify the person in this picture, I'd say it's Yin from Darker Than Black

Flinix said:
This doesn't look anything like Remilia Scarlet. If I had to identify the person in this picture, I'd say it's Yin from Darker Than Black

Yin doesn't have devil wings.