When I first got chickens and ended up with my first "accidental" rooster, I thought it was normal for roosters to mate with the hens regardless of how the hens felt about it. Sixteen years later, after observing the behaviors of hens with roosters, I now know that the normal way of things is for the hen to signal to the rooster that she is receptive to mating, much as cats and dogs do. She does this by her body language, and you will see her quickly squat for him a split second before he makes body contact with her. If you don't catch that split second, you can get the impression he is forcing himself on the hen.
Your hen is not receptive to the roosters advances. He is not a good rooster if he can't respect this. A good rooster, like a good human man, will take their cues from the female, and they will not go any further if the hen is not receptive. For a rooster to insist on mating a hen that is not receptive, he is endangering that hen. Your hen is showing every sign of acute stress from your roosters unwanted advances. You must not continue to let him have access to this hen or you risk having what happened to one of my hens happen to your hen.
I had an older hen that did not want my younger rooster anywhere near her, but he completely disregarded her signals. One day he chased her into the coop where he cornered her. She was resisting his advances with everything she had in her. The rooster was intent on overpowering her at all costs, and it ended very badly for this hen.
In the process of him attacking her and her putting up such a struggle, her comb was nearly ripped clean off her head, and the severe scalp injury was just about as bad as you can imagine. Luckily I rescued her before he continued his assault that may have resulted in her death. I did some major first aid on her, managed to graft her comb back on her head and save it. She made a full recovery, but never again did I allow the two of them to be in proximity with each other.
This was not a bad rooster. For some reason his appalling behavior was only with this one hen. He has behaved like a perfect gentleman with every other hen in the flock, never to repeat this awful behavior again in the seven years since that incident.
My advice is to do whatever is necessary to keep your rooster away from this hen. If you do not, you can expect a tragedy at some point.