Blarouse (블라루즈, Beullarujeu; or "Boulahrouz") is a Regular. He was one of the people who travelled in Koon's bag throughout the first half of the Floor of Test. He participated in the Crown Game with his teammates Kukaku Rakukakuka and Grey, and helped Koon by attacking the other Regulars. He was then assigned to the Fisherman position.
He wears an odd weapon on his arm. From his ability to attack from a distance, the shape of the weapon and the "grab" of the weapon made after attacking, one can glean that his weapon is probably a boomerang of sorts, though such speculation has not been directly confirmed.