>>1746251Some brave soul can take the task.
>>1746294Here are some things. There are some hair lines that could probably be redrawn. There seems to be nodes causing kinks that you could remove and just use the handles at the end points in a couple places. The two spiky haired parts at the back of the head should be in front of the back line You seem to have the base color of the hair over the ear. There is some color peeking on the hair below the face. Next to that you are missing a line for the hair. The face is missing a number of shadows. Her right eye is missing a tip and bend at the top. You can still see the hard line for the highlight on her right shoulder. For the hand, I would take advantage of using a mixture of hard shadows and gmesh. You should be able to tell from the original what parts could be hard shadows (mainly the back knuckles and the fingertips of the thumb and index finger). I would also just hard shadow the shadows for the breast above that.
Also, are the wing circles supposed to be transparent? I don't know the character, so I am only going off the original which look like solid fills.
>>1746356>>1746358I don't know anything about light sources. I am merely going off the original, which has a shadow at the nose, so it stays.