Bad angles and shadows, I think, making the line of her face even more severe than it would be normally. It's a bad picture imo, but her hair looks good. It reminds me of the EHEMERGERD GERSEBERMS girl a bit.
The picture with the funny jawline and chin -
Ayu has a lot of pictures like this where she's taken with bad angles + shadows and looks REALLY weird because of it. Also she looks sleepy as heck. That said, it kinda seems like this picture could have come from like 1999.