quality issue on an ai image

The vertical pointing hair on the left, the blurred zipper on the womans coat, the light upper lip on the woman where the hair crosses. Why is this a png file. PNG must have transparency. If not, it should be jpg.  

The blurry white blob in upper right corner is distracting.  I would remove it with Spot Healing brush in Photoshop.

I fixed the eyes, noses, and mouths with facial restoration software (works best with Google Chrome. I did this by taking the result and placing it beneath the original on a new layer. Masked the original image and erase the eyes, nose, and mouth individually. Facial restoration software over-compensates the skin and it's best to keep the original skin. I then rounded out the eyes as well as duplicating the woman's left eye and pasting it over her right eye.

Facial restoration: https://colab.research.google.com/drive/1sVsoBd9AjckIXThgtZhGrHRfFI6UUYOo#scrollTo=zuBCgeH08tdn

In addition, I fixed the right hand side of the woman's mouth with generative fill to remove the hairs. A little more work with Liquify is probably necessary. I duplicated the catch light from the woman's left eye and copied it to all the other eyes. Catch lights are generally identical in a portrait, regardless of the number of people involved. The hand, as @Jill_C mentioned elsewhere, could be removed entirely with gen fill. Lastly, I put a square around just a few of the stray hairs that should have been removed.