Tochirou Ooyama is a fictional character from Waga Seishun no Arcadia, part of the larger Harlock saga. He is portrayed as a close friend and loyal companion to Captain Harlock, serving as one of the key members of the crew and a symbol of steadfast camaraderie. Often characterized by his calm, thoughtful nature and technical ability, Tochirou supports the story through his bond with Harlock and his role in the formation of the ideals that define the series.