The document describes various minor characters that will attend the trial of Mang Serapio: 1) Pulubis - Beggars and members of the masses who will observe the trial. They display negative Filipino traits like shame, gossip, and status-seeking. 2) Bantays - Guards who will escort Serapio and monitor his movements. 3) Pilays - Disabled people who serve as underlings to the Federacion officers. They symbolize corrupt politicians. The document provides details on the first three characters of each group, highlighting their roles and how they represent different negative aspects of Filipino society.