Tails.Exe is Miles Tails Prower, known as Tails but he has gotten killed and demonized by Sonic.Exe. Tails.Exe has occasional bouts of aggression and brutality due to the fact that his demonization didn't go well because of a demonic essence appearing inside of Tails' mind​ known as the “inner Tails”. However, he's still able to feel a strong attachment to his friends, especially Sonic. He sometimes has control of himself, but not for long though.