Hiro Iin

Hiro Iin serves as both Rentaro's uncle and Chiyo's father, having raised her on his own following the passing of her mother. Owing to a childhood incident in which Rentaro once saved his life, Hiro holds an immense sense of gratitude and trust toward his nephew, actively trying to bring Rentaro and Chiyo together. A self-proclaimed devoted fan of his own daughter, he is known to wear T-shirts bearing slogans about spoiling her, and never holds back when it comes to expressing his affection or enthusiasm.