Yūji Sanada runs the local fish shop and raised his son Hiroyuki alone after his wife's early death. Known for a gruff and rarely affectionate demeanor, his relationship with Hiroyuki feels more like brothers than a traditional father-son bond, shaped by Yūji's own rebellious youth as a local troublemaker. He frequents the Maid Seaside Café with fellow merchants Takanori Kikuchi and Kazutoyo Arai. As a widower managing his small business, he relies on Hiroyuki's help at the shop. His interactions with other townspeople reinforce his place within the community's social fabric.