Kite Eishirou is a character from the original manga and anime series The Prince of Tennis. He serves as the tennis team captain for the私立比嘉中学校, a school representing Okinawa. At sixteen years old, Kite stands at 179 centimeters tall and weighs 72 kilograms, with an A blood type and a birthday on November 9th. He is left-handed and has an uncanny sense of balance, once demonstrating his prowess by standing on one foot for nineteen consecutive hours.

Kite is the defining force behind his team’s rise to national prominence. His primary motivation is to showcase the strength of Okinawan tennis on a national stage, a goal he fervently expresses through his belief that if their era will not come, they must create it themselves. He is characterized by a calm, collected, and intensely serious demeanor, which masks a cunning and calculating mind. Known by the moniker the Hitman or the Assassin, his playing style is ruthless and efficient, aiming to dismantle opponents by swiftly identifying their weaknesses. Despite his cold and often ruthless exterior on the court, he holds a deep sense of responsibility for his teammates, having personally recruited them for their martial arts talents and trained them rigorously. This leadership has earned him their profound trust and loyalty.

Within his team, Kite is the undisputed pillar of strength. He personally taught most of his teammates their signature moves, such as田仁志慧's Big Bang serve and平古场凛's Habu technique. He shares a particularly long history with甲斐裕次郎, having known him since the age of five, though Kite has consistently maintained a dominant position in their dynamic. After the national tournament, Kite’s journey continues as he is invited to the U-17 training camp, where he is placed in the successful group. It is here that he forms an unexpectedly effective doubles partnership with丸井文太, with their coordination being hailed as a perfect combination. He is ultimately selected as a member of the middle schooler expedition group, ranked number twelve.

Kite's role in the story is primarily that of a formidable antagonist for the protagonist team, Seishun Gakuen. He leads his school, which employs aggressive tactics and intimidation, to the national championships. His pivotal match occurs against部长手冢国光 in the first round of the national tournament. Kite initially dominates the match using his ultimate technique, the全方位缩地法, a movement skill derived from martial arts that allows him to cover the entire court as if shrinking the distance to the ball. He also utilizes powerful serves and shots like the Big Bang and Habu to keep his opponent on the defensive. However, as the match progresses, he is ultimately defeated by Tezuka, a loss that profoundly impacts him. In a moment of desperation, he even resorts to using sand to blind his opponent, a tactic for which he is later criticized. This defeat marks a turning point, leading him to refine his playing style away from purely underhanded methods.

Kite possesses a wide array of notable abilities derived from his background in Okinawan martial arts. The全方位缩地法 is his signature technique, which he has perfected to move in any direction, not just forward and backward. His offensive arsenal includes the powerful Big Bang serve and the snake-like curveball known as Habu. Later in the U-17 camp, he develops a new technique called冲绳式二刀流狮威左亚, a dual-wielding style taught to him by大曲龙次, which he uses to complement his partner's play. Off the court, Kite has a meticulous personality; he spends exactly one hour and fifteen minutes each morning styling his hair and has a habit of adjusting his glasses with his right hand using a knuckle, which is interpreted as a sign of his meticulous and somewhat neurotic nature. His interests include watching theater, listening to the music of Schubert, and surprisingly, fashion design, in which he claims to excel.