Sonetto Hoshino is a pivotal character in the anime series Gyaku: 1999. Known for his sharp intellect and strategic thinking, Sonetto plays the role of a detective unraveling complex mysteries that occur in the dystopian setting of 1999. With a calm demeanor and an analytical mind, he often collaborates with the protagonist to solve cases, contributing significantly to the storyline. His ability to perceive details overlooked by others makes him an invaluable asset in the fight against crime and corruption, shaping the narrative's progression.