Valeria commands Filgaia's forces as a high-ranking member of ROOF, appearing in "Wild Arms: Twilight Venom" Episode 16 ("Fatal Goddess"). His persona is defined by an intense obsession with superficial beauty and a consuming drive to be hailed as Filgaia's ultimate hero. These ideals fuel his actions and motivations throughout his involvement.

A critical revelation during the series' climax exposes Valeria not as human, but as a Gene Driver – an artificial construct created by ROOF. This truth plunges him into existential turmoil as he struggles with his artificial nature while confronting its shattering implications for his identity. Despite this profound crisis, he ultimately resolves to fulfill his self-appointed protective duty.

Valeria meets his end in the final battle, sacrificing himself directly against the Twilight Venom entity in a desperate bid to shield the world. This act of self-sacrifice marks the pinnacle of his journey, transforming his initial fixation on external heroism into a genuine, albeit fatal, commitment to Filgaia's salvation, sealing his place within the saga's exploration of heroism and identity.