The document analyzes the character traits of the seventh juror in the movie "12 Angry Men" who is identified as the leader of the group. Some key reasons cited for considering him the leader are that he remained calm and logical throughout the deliberations, was able to influence the others with his rational arguments, took the issue seriously, and persisted patiently until he convinced the entire group to change their initial guilty verdict to not guilty. The document also discusses traits of effective leadership like taking responsibility, listening to others, and focusing on the goal rather than emotions.