Marjo is a fictional villain and one of the main antagonists in the Time Bokan series. She is the leader of the Doronbo Gang, a trio of comical thieves who repeatedly try to locate historical treasures and defeat the heroes, only to fail in humorous ways. Marjo is portrayed as clever, vain, and temperamental, but also entertaining and charismatic. Her role is central to the series' comedy and conflict, as she drives many of the episodes' schemes and slapstick rivalries.