Riker is the second Bob clone, taking on a serious and duty-oriented persona with leadership capabilities, reflecting the Star Trek character he names himself after. Tasked with diplomatic missions, he embodies Bob’s sense of responsibility and prioritizes humanity's needs.

Bill is the third Bob clone who focuses on scientific research and prioritizes understanding over exploration. Stationed in the Epsilon Eridani system, he works on technological advancements like faster-than-light communication and serves as a stabilizing force within the Bob collective.

Milo personifies Bob's wanderlust, choosing personal adventure and exploration over collective duty. His actions exemplify individuality within the Bob collective, as he travels to new star systems for personal interest rather than strategic advantage.

Mario represents the loner aspect of Bob’s personality, choosing isolation by traveling to distant stars. His brief but significant role involves discovering a potentially hostile alien species, illustrating the varied potential of even the most withdrawn Bobs.

Dr. Landers is a scientist working for FAITH, who first orients Bob to his new reality as a replicant. Balancing scientific ethics with his duties, he aids Bob's transformation by removing constraints and offering guidance.

Major Ernesto Medeiros serves as the primary antagonist, a replicant of the Brazilian Empire focused on conquest and aggression. He contrasts with Bob, representing competitive and militaristic ideologies in the narrative.

Carl, Karen, and Alan are Bob's friends and colleagues, serving to establish his human background and relationships. Their interactions highlight Bob’s rich personal life and pose poignant questions about his choices.