Knight Zeta, also known as Fencer Zeta or Swordsman Zeta, leads the Algus Knights' horseback team within the Algus Kingdom. He rides his trusted steed Argama, vital for his mobility and combat role. His characterization emphasizes swift action and decisiveness; he is consistently the first among his peers to move during critical situations, showcasing his proactive nature in leadership and battle.

A significant narrative aspect involves his strong support for Knight Amuro's leadership. After Knight Alex, the previous Algus Knights leader, is captured by the Munzo Empire, Knight Zeta actively champions Knight Amuro to assume command. He demonstrates firm belief in Knight Amuro's potential, seeing him as a capable leader despite initial skepticism from others. This endorsement underscores Knight Zeta's role in facilitating leadership transitions and maintaining unity during internal discord.

Knight Zeta participates in pivotal conflicts across the saga, including battles against the Munzo Empire, influenced by the Zeon race. His involvement extends to the climactic confrontation in the Moore dimension, where the Algus Knights unite against the mastermind Sieg Zion and the resurrected Black Dragon, depicting his consistent presence in major campaigns. His character remains defined by his established role within the Algus Knights' storyline.