Fate Testarossa's familiar, mentioned briefly during Nanoha's encounter with Fate and Precia.
Arf serves as Nanoha's loyal familiar and combat partner, evolving from a rival challenger to a steadfast guardian across the series.
Arf and Signum align their combat roles within the division, providing overlapping aerial and ground support.
Raising Heart's energy signature complements Arf's familiar abilities, enhancing combined strike potential.
Arf and Vita synchronize their aerial capabilities to counter enemy defenses during critical incursions.
Explore the full interactive character relationship map of Magical Girl Lyrical Nanoha