Kesselmeyer is a banker and a friend of the Buddenbrook family, albeit not a particularly loyal one. When Tony’s first husband, Grünlich, becomes irreparably buried in debt, Kesselmeyer gleefully informs Tony’s father (the consul) that Grünlich has been altering his financial documents to make himself seem wealthier and more successful than he really is—and that all the important local firms have been aware of the scheme all along.