The Firing Squad expansion adds three new characters to play as for the Mayhem player. Scheherazade is one of Mayhem’s most deadly assassins. Oni, a.k.a. Masamune Senichi, is a lethal killing machine and wields a silenced pistol. Kingpin, a.k.a. Pierce Washington, is the current leader of the Vice Kings and carries an SMG that spews out damage, a flare gun that has an explosive area of effect, or a plasma thrower that he can charge up and use to debuff enemies.