Alceides leads the Argonauts, a radical terrorist group operating from a self-propelled city-fortress within Olympus. He opposes the existence of bioroids. Reported dead approximately 20 years before the series events during a Poseidon bombing of the Argonauts' fortress, he nonetheless reemerges to lead the group. He aligns the Argonauts with the broader Human Liberation Front, which resists bioroid governance and the Ark Project, an initiative preserving humanity's future under bioroid supervision. His group conducts terrorist acts, including bioroid assassinations, hijackings, and direct attacks on Olympus' infrastructure and personnel. These operations form a central conflict, challenging Olympus' stability. Alceides' motivations stem from opposition to perceived bioroid dominance and the Ark Project's implications for human autonomy. His background includes association with Poseidon's historical conflict, though details beyond his leadership role remain undisclosed. His return from presumed death positions him as a persistent antagonist driving the Argonauts' anti-bioroid campaigns. His strategies leverage the mobile fortress's capabilities and coordinate assaults to disrupt the city-state. His documented role remains orchestrating anti-bioroid activities. His influence persists through the Argonauts' actions, contributing to tensions between humans, bioroids, and cyborgs.