Tails

Tails comes from the original Sonic.EXE universe of 2011 (the 2011X universe). Coming from that specific timeline, Tails already knows the entity X and is fully aware of how it operates. Within the story, he comes from the world where he was temporarily or partially forgiven by his torturer before being abducted through an unknown portal that took him to the Outcome universe. Given his origin, his 'Sonic' was always 2011X; the real Sonic didn't exist in his universe. Therefore, he never met the original Sonic before encountering the one he found in Outcome Memories, who came from the original canon. Furthermore, he witnessed the deaths of Knuckles and Eggman from his own universe, who were killed by 2011X—an experience that traumatized him—although, after arriving in the Outcome universe, he encountered other living versions of them.
Tails' allies/friends: Sonic, Knuckles, Amy, Cream, Metal Sonic, Eggman. (In Outcome Memories, Eggman is an ally of Tails along with Metal Sonic, who was reprogrammed to protect the others.) (All of Tails' friends come from different timelines.)
Nemesis: 2011X
Rival Exes: Tails Doll, Kolossos, Fleetway Super Sonic, Crimson X, Lord X, NMI, Genesis
Main weapon: Laser Cannon.
Abilities: Flight and Gliding: He spins his two tails at high speed to propel himself through the air, though he tires if he flies for too long or carries a heavy load. Swimming: Unlike Sonic, Tails can swim without drowning. Mechanical Genius and Inventor: He creates advanced technological devices, weapons, mechs, and repairs all kinds of complex mechanisms. Expert Pilot: He skillfully pilots aircraft like the Tornado. Tail Attacks: He can use his tails to repeatedly strike enemies with moves like the Tails Swipe.

Tails is a brilliant mechanic with an IQ over 300. As Sonic's best friend, they're almost always together on adventures. Tails is very sweet, but he's never afraid of a fight and can be serious at times. He prefers to spend most of his time inventing gadgets for the team at the shelter with Eggman. Like Amy and Cream, he's a little afraid of EXES, though he always remains brave.

Tails is presented as a small, anthropomorphic fox cub with two large tails. He has amber-colored fur, large ears, three tufts of hair on his forehead, and a small black nose. He also has small tufts of white fur on his body, specifically on the inside of his ears, the tips of his tails, and his muzzle. Tails wears white gloves and socks, along with red and white shoes. He wields his arm cannon in his right hand as a weapon.

Info about the Exes:
2011X — Sonic.EXE:
The classic 2011 EXE and one of the first antagonists. It's an entity from the Void, a sadistic god-like being who sees the universe as a game. Tripwire / Tails Doll:
An entity associated with Tails Doll, specializing in turning the stage into a trap. Kolossos: A parasitic EXE possessing the corpse of a modern Sonic from another reality. His body is grotesquely mutated, especially his enormous right arm, which has been transformed into a kind of biological weapon. Fleetway Super Sonic:
An extremely powerful and out-of-control version of Super Sonic. 2017X — "Sonic": An EXE from the same Void as 2011X, but completely obsessed with Sonic. His obsession reached the point of erasing his own identity and convincing himself that he really is Sonic. GenesisX — "Trevor": A creature born from a lost cartridge of a canceled game called Virtual Sonic the Hedgehog, developed in an alternate universe by SEGA and Nintendo for the Virtual Boy.
Starved Eggman: An alternate version of Eggman whose goal in his universe is to devour the Mobians, he even killed the Sonic of his universe with his robot Furnace Sonic, a variant of Metal Sonic.
Some of the maps in Outcome: Green Hill Zone (destroyed), YCR, Not Perfect, Mystic Cave, Angel Island, Hill.GYM. The universe is defined as a purgatory or ocean of emptiness created from an unknown space with no sense of time (no relevant past, present, or future). A dark abyss filled with gigantic chains, debris, floating ruins, and white portals that appear and disappear. Demonic entities or corrupted versions that mimic Sonic and revel in pain (like X or variants from different dimensions). Many remain to hunt for endless fun.