Character: Yukio (Koyuki) Tanaka

Ang ating bida sa kwento at ang pinakahuling member ng grupo. Isang ordinaryong teenager na walang special talent hanggang makilala nya si Ryusuke. Masusubaybayan natin dito kung pano sya naging magaling na gitarista at swimmer. Sya ang nag-iisang nakapag pakanta sa ibong si Page. Sya rin ang huling member na sumali sa banda.

Character: Yuji (Saku) Sakurai

Ang pang-apat na member ng banda. Isang mabuting kaibigan ni Koyuki. Naging drummer ng banda pagkatapos umalis ng original drummer dahil sa problema sa pamilya.

Character: Chiba Tsunemi

Lead vocalist ng bandang BECK. Pinakamakulit at pinaka barumbado sa grupo. Pang punk at rock ang boses nya, na sya namang karamihan sa kanta nila. Sya rin ang nag bigay ng pangalan ng banda habang nakatitig sa aso ni Ryusuke na may parehas na pangalan. Sya rin ang dahilan kung bakit naisama ni Ryusuke si Taira sa banda.

Character: Taira Yoshiyuki

Ang unang member na narecruit sa bandang BECK. Bahista ng banda at isa sa pinaka talented sa grupo. Tahimik lang at laging seryoso. Nagtatrabaho sya bilang trapik pulis sa umaga.

Character: Ryusuke (Ray) Minami

Founder at lead guitarist ng bandang BECK. Isang American-Japanese na fluent magsalita ng English at Nihonggo. Sya ang naging inspirasyon in Koyuki na mag-aral ng gitara. Nung kabataan nya ninakaw nila ni Eddie ang legendary guita na si Lucille at ang weird na asong si Beck sa sasakyan ni Leon Syke, na sa bandang huli ay naging pag-aari nya rin.

Trivias

In episode 14, Koyuki is looking at some CDs in his bedroom. Two of the CDs have the words "Beat Crusaders," printed on them, which is the group responsible for the OP of BECK, "Hit in the USA."

In the initial airing of the first few episodes, the title screen is incorrectly spelled as "Mongorian Chop Squad." This was fixed for later episodes and presumably the DVD release.

Many real world musical acts are referenced in the show. The closing credits feature Bob Marley and Kurt Cobain, as well as many other Japanese acts. In episode 4, the poster of the Rocket Boys is actually a picture of popular Swedish punk band the Hives. And in one episode, Koyuki is looking over a Dying Breed CD case, but the back cover of the CD is actually the back cover for Portishead's live album, PNYC.

In episode 18 when we are first in the Marquee, the song in the background is the Beat Crusaders song, "Last Minute".

Beck Episode 26 featured popular Japanese Rock Group The Pillows' Sawao Yamanaka as a cameo character. Yamanaka's in-series band, The Heroes (An obvious pun based on the katakana for "The Pillows") even plays several Pillows songs.

In episode 8, when Koyuki talks about how the main character of a movie plays an opera in prison to give the convicts the feeling of freedom for a brief moment, the movie that he was talking about is called Shawshank Redemption.

In episode 17 when Koyuki gets his telecaster and plays it at home, he plays "Bombtrack" by Rage Against the Machine.

A few songs within Beck are covers of songs from Beat Crusaders (such as Gymnasium and Love Disorchard).

Kazuya Hirabayashi, who happens to play guitar for the J-Punk group, Husking Bee, does Koyuki's singing voice.

Story Line

Nagsimula ang lahat ng iligtas ni Yukio, mas kilala sa palayaw na Koyuki, ang isang weird na aso na pinagtitripan ng isang grupo ng mga kabataan. Dito nya nakilala ang amo ng aso na si Ryusuke. At dahil dun naging mabuti silang magkaibigan at ito rin ang simula ng kanilang maganda at delikadong pakikipagsapalaran sa mundo ng musika.

Nakapokus ang istorya sa hirap at problema ng nagsisimula palang nilang banda na BECK, na sya ring pangalan ng aso ni Ryusuke. Naglalaro din ang istorya sa relasyon ni Koyuki sa kapatid na babae ni Ryusuke na si Maho.