Guso Drop are a Japanese idol group formed in Tokyo in 2014. Their music blends many genres (metal, djent, dubstep, techno, punk, ska and pop) into one style of "loud" idol music. They are formed of five members, each represented by a different "middle finger colour": Rei (Black), Shion (Purple), Saki (Red), Yura (Yellow) and Anna (Blue). Saki and Rei both performed screams and growls, Anna is in charge of the spoken-word monologues and Rei also raps.