Mamoru Uotora is the father of Himeko Uotora, a shachihoko craftsman by trade who works with carved decorative fish. He suffers from acute lower back pain and is hospitalized, an impairment that affects his daily life. Mamoru is a calm and kind individual who possesses a quiet, caring nature. Despite his physical limitations and his modest occupation, he is motivated by a deep sense of responsibility and care for his family. His role in the story is that of a supporting figure, providing a familial anchor for his daughter Himeko and appearing primarily in episodes set in the Aichi area during the group's travels. His key relationship is with his daughter, whom he supports despite his own health struggles. Mamoru does not undergo a major personal transformation during the series but remains a steady, parental presence whose condition highlights the everyday challenges faced outside the conflicts between Bests. He has no combat or supernatural abilities; his notable trait is his craftsmanship as a shachihoko maker, a traditional skill that ties him to Japanese cultural artistry.