Characters
Yukio "Koyuki" Tanaka (田中 幸雄, Tanaka Yukio)
Voiced by: Daisuke Namikawa, Kazuya Hirabayashi (singing voice) (Japanese); Greg Ayres (English)
Portrayed by: Takeru Satoh
The series follows his rapid development from living a boring average life to becoming an outstanding guitarist and singer. Before meeting Ryusuke, he only listened to Japanese pop music, having never heard a foreign band before. He is the last member recruited into Beck (along with Saku), playing rhythm guitar and singing slower songs. Throughout the series, Koyuki plays a Fender Telecaster, Gibson SG, Fender Mustang and Gretsch White Falcon at various points.
Ryusuke "Ray" Minami (南 竜介, Minami Ryūsuke)
Voiced by: Yuuma Ueno (Japanese); Eric Vale (English)
Portrayed by: Hiro Mizushima
A slacker, but talented guitarist, who inspires Koyuki to pick up the instrument. Ryusuke speaks better English than Japanese, having lived in New York for eight years. He is the lead guitarist of Beck as well as its founding member. A large part of the story revolves around him and his bullet-hole ridden Gibson Les Paul guitar, named Lucille.
Maho Minami (南 真帆, Minami Maho)
Voiced by: Miho Saiki, Sowelu (singing voice) (Japanese); Brina Palencia (English)
Portrayed by: Shioli Kutsuna
Maho is Ryusuke's younger half-sister and a talented singer. She is brash but emotionally fragile, and gradually builds a romantic relationship with Koyuki. As Maho is beautiful and fairly popular, Koyuki often has a hard time approaching her romantically. While she is obviously a gifted singer, Maho confides in Koyuki that she would actually like to be a film maker. She is also an amateur model.
Tsunemi Chiba (千葉 恒美, Chiba Tsunemi)
Voiced by: Shintaro Ohata, Tatsuzo (singing voice) (Japanese); Justin Cook (English)
Portrayed by: Kenta Kiritani
The main vocalist of Beck, Chiba's vocals are more punk and rap-oriented than Koyuki's and thus more fitting for the majority of Beck's songs. He is easily the most volatile member of Beck, never shying away from a fight or hiding his feelings during dire situations. He is also very good at karate, which he uses in his performances. He originally took up karate because he was bullied severely in his younger days. When not busy with the band, he helps manage his family's ramen shop; he says that if Beck doesn't work out, he would open up a chain of ramen shops. Towards the end of the series, Ryusuke tells him that he should leave the band because he thinks he is not as passionate about music as the rest of the band. He complies, but quickly returns to play with the band.
Yoshiyuki Taira (平 義行, Taira Yoshiyuki)
Voiced by: Kenji Nojima (Japanese); Jerry Jewell (English)
Portrayed by: Osamu Mukai
Beck's bassist, Taira is the second member recruited by Ryusuke. Although he can sometimes seem uncaring or apathetic, he is actually the most mature of the band members and often offers helpful advice. He usually performs shirtless, and his main bass is a white Music Man Stingray.
Kenichi Saito (斉藤 研一, Saitō Ken'ichi)
Voiced by: Porsche Okite (Japanese); R Bruce Elliott (English)
Portrayed by: Takanori Takeyama
Saito is a perverted middle-aged man and former Olympic swimmer who teaches Koyuki both guitar and swimming in exchange for Koyuki working for his business. Though he can be a demanding instructor, he opens up to Koyuki, even asking him for relationship advice on occasion.
Yuji "Saku" Sakurai (桜井 裕志, Sakurai Yūji)
Voiced by: Tōru Nara (Japanese); Johnny Yong Bosch (English)
Portrayed by: Aoi Nakamura
Saku is Beck's drummer and the last member to join (along with Koyuki). He first becomes good friends with Koyuki at school, being the only person to talk to him while bully Hyodo instigated the entire class not to do so. He is closer to Koyuki than the other members of the band, and Koyuki often confides in him during moments of self-doubt. Towards the end of the series, he moves away to attend high school, but promises that he will return on the condition that Beck reunites. As Koyuki does reform Beck, he returns, telling the band that he essentially ran away from home to do so.
Togo (持ち帰り, Togo)
Voiced by: Yoshiharu Taka (Japanese); Orion Pitts (English)
Portrayed by: Naoki Kawano
He is the original drummer of Ryusuke's band Beck. Togo and Ryusuke's were friends later he leaves the band due to some personal reasons; however, he is proud of Ryusuke.