Mr. Wentworth is the father of Brian Wentworth
and serves under Miss Cadwallader
. He is a witch who is exploited by the school and forced to give up a good chunk of his wages, preventing him from ever making enough money to support himself on a scale higher than rudimentary. His son believes that Mr. Wentworth does not buy nice things because he is evil and greedy, but this is not the case.