Judge Bean

 presides over the trial which will determine whether Aunt Clara is magically competent. If she is, she will remain in witch society. If she is not, she will be made earthbound - her powers will be taken away. Judge Bean has made up his mind already as the trial begins, but Samantha, as Clara's defense counsel, pleads for a fair hearing of the evidence.

He is cantankerous and impatient, and treats Clara with disdain.