The Berserker has a short, silver handle with a bronze spike set in its pommel. It has a large, two-pronged blade. The base of the blade sports a short spike on either of its sides. The tip of each prong is flat and slats inward. The lower half of the blade is sky blue, while the upper half is pale yellow, and the two colors blend together at the center. The entirety of the blade has grey edges.
When Saïx enters his berserk state, the entire blade gains a thick, white additional blade around it. This new blade has thin, yellow edges.
The name is derived from Saïx's Berserk state.
Berserker's ground combo consists of a forward dash and a slow 360° spinning slash, followed by a leap forward and a powerful downward slash.
The aerial combo consists of a sideways slash, followed by an upward diagonal slash and a more powerful downward vertical slash.