Always solve for the peace of the flock. One of the birds needs to leave your flock. But you need to try it first, because you are new and might not see it right.
If you pull the rooster, either the flock will relax and be peaceful, or a more dominant hen will rise up and continue picking on the victim. If that happens, then the victim needs to go.
Or pull the victim, if the tension in the flock drops, good. Or the rooster might pick a new victim. If so, he needs to go.
But do remove one.
Just to be sure you have enough space, what are your measurements, what is your head count? Because an over crowded coup causes these problems.
good animal husbandry requires people to adjust the flock.
Mrs. K