The Werewolf has a short, white handle with a pink spike set in its pommel. It has a large, two-pronged blade. Each prong has two short spikes on its outer edge, and the tip of each prong is flat and slats inward. The entirety of the blade is gold and has black 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 New Moon and Berserker claymores are palette swaps of Werewolf.
This weapon's name ties into Saïx's attribute, the Moon. Like Saïx, werewolves are noted in legends to go into berserk stages under the influence of lunar energy.
Werewolf's ground combo consists of a fast downward diagonal slash followed by a leap forward and a more powerful downward diagonal slash.
| New Moon | Werewolf | Artemis | Luminary | Selene | Moonrise | Astrologia | Crater | Lunar Phase | Crescent | Gibbous | Berserker | Twilight|
Queen of the Night | Balsamic Moon | Orbit | Light Year | King of the Night | Moonset | Horoscope | Dichotomy | Lunatic | Just Desserts | Bunnymoon
| Sanction | Killer Bee | Moonglade | Product One | Goliath | White Tome | Werewolf | Doldrums | Tune-Up | The Magician | Jilted Anemone | Orage | Missing Ache|
Kingdom Key | Soul Eater | Kingdom Key D | Mage's Staff | Knight's Shield