Kosuke Sanada is a supporting character from the anime Jewelpet Happiness. He is a first-year high school student at Jewel Academy and belongs to a group of four popular male students known as the Popular Quartet, which includes his friends Izumi, Takumi, and Juushirou. Kosuke is well-regarded for his good looks and his talent as a guitarist, and he serves as the leader of the school’s music band. Despite his popularity, he is consistently portrayed as kind, approachable, and nice to everyone around him. His demeanor is calm and thoughtful, which makes him a steady presence among his peers. In the story, Kosuke fills the role of the love interest for the main protagonist, Chiari Tsukikage, who develops a romantic crush on him. He supports her goals and encourages her efforts to succeed. Additionally, the underclassman Marie also harbors feelings for him, further highlighting his central place in the series’ interpersonal dynamics. His abilities revolve around his musical skill with the guitar and his leadership of the band, which are notable aspects of his character within the school setting. His background and personal development are not extensively explored, but he remains a reliably friendly and supportive figure throughout the series.