Bardiche, an Intelligent Device crafted for Fate Testarossa by the Testarossa family's cat familiar Rynith, exhibits a male persona and addresses Fate as "sir," reflecting an old-fashioned demeanor tied to its namesake European polearm. Initially appearing as a triangular golden gem in Standby Form, it primarily operates in Device Form—a bearded axe enabling melee combat and spells like Photon Lancer and Thunder Smasher. It accesses Scythe Form for Arc Saber attacks and Sealing Form for containment spells such as Thunder Rage.

During *A's*, Bardiche suffers severe damage against Signum's Laevatein. Per its request, Mariel Atenza upgrades it to Bardiche Assault, integrating a revolver-style Belkan Cartridge System (CVK792-R). This retains the original Standby Form while adding three active forms: Assault Form (cartridge-enhanced Device Form), Haken Form (Scythe Form augmented with fin blades), and Zanber Form (Full Drive mode generating a massive energy blade for high-output attacks like Jet Zanber and Plasma Zanber). Despite the official rename, Fate continues calling it "Bardiche."

In *StrikerS*, Bardiche Assault develops Riot Blade, a compressed Zanber Form optimized for close combat. This branches into Riot Zanber, featuring sub-forms Riot Zanber Stinger (twin blades linked by an energy string) and Riot Zanber Calamity (a combined Zanber-like sword). Later, during *Force*, it upgrades to a 5th Generation Device, converting mana into physical energy to counter anti-magic threats. This iteration introduces Riot Blade II (enhanced single/dual blades) and Riot Zanber II for warship-level suppression.

The movie continuity redesigns forms: Device Form becomes Axe Form (rounded blade, elongated spikes), Sealing Form becomes Glaive Form (three mana blades), and Assault Form becomes Bullova Form. Haken Form is renamed Crescent Form, while Zanber Form remains visually consistent. In *Reflection*, Bardiche Assault upgrades to Bardiche Hornet, featuring a hilt-based Standby Form and two specialized forms: Straight Saber Form (an energy sword resembling Riot Zanber II) and Javelin Form (a bombardment polearm). This iteration omits Bullova and Crescent Forms due to urgent circumstances.

Bardiche bears epithets like "Bardiche Assault" (post-*A's* upgrade) and "Battleaxe of Flash," a title from Rynith's creation description.