Briareus is the proeliator on the 4th floor in the Tower of Purgatory/Stairway to H.E.A.V.E.N.
About this creation
Briareus is the proeliator of the 4th floor. He is made in his Rengoku II form. He also appears on the 22nd floor of HEAVEN in his Rengoku form. I can't say anything about weapons, the only weapon known is the Reflect pulser on his head.