Yattaran serves as first mate aboard the Arcadia, loyally supporting Captain Harlock. He cuts an imposing figure with a substantial build and towering height, distinct among the crew. His attire features a skull-and-crossbones bandanna, a light blue shirt accented by a dark stripe, rugged jeans, and leather shoes. Dark brown hair, a thick mustache, and oversized round glasses complete his rugged yet approachable look. Balancing an easygoing nature with unwavering loyalty, Yattaran treats the crew as kin, offering steadfast support even to newcomers like Yama. Though he admires Yama’s talent and empathy, deviations from plans—whether from Harlock’s tactics or Yama’s choices—stir frustration. Yet he persists in overcoming challenges, frequently collaborating with allies such as Kei Yuki. His mastery of the Arcadia’s labyrinthine structure allows swift navigation, a vital asset in combat. There, he pilots close-quarters powered armor, often outfitted with fins and axes for brutal efficiency. Yattaran joined the Arcadia under mysterious circumstances, later aiding Yama and Kei in deploying a vibration bomb. When Yama sacrifices himself during the mission, Yattaran rescues Kei. He fights alongside the crew against the Sanction Fleet, securing a pivotal victory despite initial doubts. Yama’s exposure as a spy fractures his trust, but after discovering Earth’s habitability, he reconciles. Urged by Kei, he aids in freeing the Arcadia and spreading proof of the Sanction’s deception. During a clash with the Jovian Blaster, he falls unconscious as the ship activates defenses, reviving later as Yama takes command to continue their voyage. Consistent across adaptations, Yattaran endures as a dependable first mate, his skills and devotion to Harlock and the crew unshaken.