The Riot B is piloted by Agnes Berge. The Riot B (along with the Riot A) are the basis for the mass-produced Riot Cs. The Riot B specializes in melee combat.
- Chest Vulcan Cannon
- The Riot B's chest opens up and it fires its vulcans at its opponent.
- Prototype Proton Saber
- The Riot B's shoulder holsters open up and reveal the sabers. The Riot B grabs them and uses them to attack its opponent.
- Prototype Proton Spike
- The protective guards on the Riot B's arms flip forward and create photon blades. The Riot B proceeds to use them as melee weapons.
- Prototype Proton Saber (Full Power)
- The Riot B's shoulder holsters open up and reveal the sabers. The Riot B combines the sabers to create a huge energy blade and does a heavy downward chop with the blade.