Mrs. Bramble is presented as a dominating and decisive personality. She is feared and respected by Mr. Bramble and her brother Major Percy. She takes all the major decisions. Mr. Bramble is made to yield to her in good humour. The very naming of Harold proves that when it comes to decision making, Mrs. Bramble has the final say. The poor husband had to withdraw his suggestion with the utmost good humour. Mrs. Bramble is a possessive and overprotective mother. Harold doesn't like that she should address him as if she is addressing a baby. Mrs. Bramble is highly proud of bringing such a prodigy as Harold into the world. Harold's unique character and his perfection becomes a drawback for her. She persuades her husband that Harold should not be disgraced and embarrassed by knowing Bill's real profession. Here, she is totally mistaken like Mr. Bramble and Major Percy. She fails to see the other side of Harold's personality. She can't even dream that her spectacled and scholarly son can have such a deep interest in boxing.
Ironically, Mrs. Bramble fails to understand that Bill's true identity could have been a matter of pride and swanking for Harold. But she is more practical than Bill. No doubt, she hates Bill's profession. She realises that Bill's boxing career has earned a lot of money for the family. With that money they could give Harold the best possible education. She is shocked when she comes to know that Bill has withdrawn from the contest against Murphy.