Blue Squares

The Blue Squares is a color gang that conflicted with the Yellow Scarves many times. Their conflict with the Yellow Scarves was orchestrated by Izaya Orihara and ultimately led to the downfall of both the Yellow Scarves and the Blue Squares

After, the incident of kidnapping Saki, some members of the Blue Squares were arrested by the police, while some others joined the Yellow Scarves. Masaomi Kida goes and talks to a member of the Dollars and former member of the Blue Squares, Kyohei Kadota, about the Blue Squares.

According to Kadota's friends, they say Blue Squares never existed. That Kida was fighting with a gang that never existed, with the implication that the Blue Squares gang was a tool of Izaya Orihara as a tool to manipulate the color gangs of Ikebukuro, and through it the head of the Yellow Scarves, Masaomi Kida.

Trivia

 * As the name Yellow Scarves is a reference to the Yellow Scarves Rebellion, it is possible that the name "Blue Squares" could be a reference to the "Blue Sky" referenced in the he Rebellion's slogan. The slogan is “The Blue Sky has perished, the Yellow Sky will soon rise; in this year of Jia Zi, let there be prosperity in the world!” (蒼天已死，黃天當立. 歲在甲子，天下大吉. ). In the context of the original rebellion, the Blue Sky was a reference to the Han Dynasty, the Yellow Sky was the rebellion, however, it is entirely possible that Orihara Izaya would have seen creating the Blue Squares as a poetical opponet for the Yellow Scarves.