Rantarou Kiyama

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 a character featured in the anime and manga series, Beyblade Burst. He is a member of the Beigoma Academy BeyClub as well as a member of the Spanish team: BC Sol. He currently battles with his Beyblade, Roktavor R3 4Cross Flugel. He is also the older brother of Ranjiro Kiyama.

(Source: https://beyblade.fandom.com/wiki/Rantaro_Kiyama)