Rantaro Kiyama (黄山 乱太郎, Kiyama Rantaro), also known as The Boss (クミチョー, Kumicho) in the Japanese version and The Head Honcho or Honcho for short in the English version, is the tritagonist in the anime and manga series, Beyblade Burst and one of supporting characters in Beyblade Burst Evolution and Beyblade Burst Surge. He is a member of the Beigoma Academy BeyClub as well as a member of the Spanish team: BC Sol. He returns in Beyblade Burst Surge as the coach for the protagonists Hikaru Hizashi and Hyuga Hizashi's team: The Comets. Rantaro currently battles with his Beyblade, Glide Roktavor Wheel Revolve 1S. He is also the older brother of Ranjiro Kiyama.
Rantaro is a tall, comparative to his age, fair-skinned boy, has blonde hair that he wears in a pompadour and brown eyes. He wears a bandage on the bridge of his nose, has a habit of keeping an orange and red lollipop in his mouth, and carries a large white paper fan.
In Burst and Burst Evolution, his attire consists of a black gakuran jacket slung over his shoulders, akin to a cape, a dark-red tank top underneath, black gakuran trousers, a white sash as a belt, and brown laceless shoes. When he battles in Burst, he initially placed his comic books around his waistband (In the manga, these are specifically CoroCoro comics).
In Surge, he retains his full gakuran attire, but the jacket has a red interior and gold buttons, he wears an orange dress shirt, a blue sash as a belt, and brown dress shoes.
