Gorō Arashiyama serves as a dedicated lifeguard at the beach adjacent to the Lemon Beach House. His sun-bronzed skin and practical attire—red swim trunks, a red-and-yellow hat, and bare feet—reflect his daily commitment to coastal vigilance. Approaching his duties with a disciplined, almost heroic intensity, he prioritizes safeguarding swimmers and responding swiftly to emergencies. Beneath his professional exterior lies an unspoken affection for Chizuru Aizawa, the eldest sibling managing the beach house. He frequents the establishment to discreetly observe her, masking his feelings through actions like volunteering to teach her younger brother Takeru swimming skills. His childhood camaraderie with Eiko Aizawa involves lighthearted teasing balanced by an easygoing mutual respect. Gorō clashes frequently with Ika Musume, whose chaotic antics—from pilfering his meals to disrupting rescue operations—strain his patience. Yet their antagonism occasionally shifts to uneasy collaboration when public safety requires joint effort. His family life includes a retired sumo wrestler mother known for her hearty meals and newfound curiosity about local scientific projects, though her direct impact on his choices remains undefined. While his professional focus remains unwavering across documented appearances, his personal dynamics—unrequited longing, rivalries, and alliances—add texture to his role as a steadfast secondary figure within the beachside community.