>>1425628Hmm, I think it because she's not exactly facing forward. Maybe the ears was supposed to move in a different way, the right ear to the side while the left ear to the front.
I tried to compare it with other pics as well, my advice is to move the above line a bit like
>>1423780The line join seamlessly with the hair part. The ears going to be big, i think. If only the were more pics reference at PIXIV
<<on this pic her ears are located pretty big starting on the back