Hiroto Yasaka is Subaru Mikazuki's longtime neighbor and childhood friend. He possesses an average height, short brown hair, and green eyes. Hiroto typically dresses in casual black shirts and gray pants, while his work attire consists of a formal black suit coat, white collared shirt, purple necktie, black pants, and a black belt. He habitually visits Subaru's home unannounced, primarily to deliver food. This stems from Subaru's tendency to neglect cooking and keep minimal food supplies, reflecting Hiroto's consistent concern for Subaru's nutritional well-being. Hiroto exhibits patience and understanding towards Subaru's reclusive nature and occasionally abrasive behavior, never reacting negatively. He belongs to the Yasaka family, which includes siblings Nagisa (17), Hayato and Narumi (twins), and Misora (3). Nagisa harbors a crush on Subaru, further linking the families. Beyond friendship, Hiroto occasionally facilitates Subaru's gradual reintegration into social interactions.