Nine Tails is a variation of Tails from Sonic Prime, reimagined as a more solitary and inventive version of Miles "Tails" Prower. He is a mechanically gifted fox who builds gadgets, vehicles, and defenses to survive in the shattered world of the Shatterverse. Nine plays a major supporting role as both an ally and a conflicted counterpart to Sonic, often driven by mistrust and a desire for independence. His character arc centers on loneliness, intelligence, and the struggle to choose between isolation and friendship.