Free (Soul Eater), The Man with the Demon Eye, Werewolf from the Immortal Clan.
Possess "true" immortality
The power to
be eternal and indestructible. An advanced version of Immortality.
The user possesses absolute immortality, unable to die, get sick, or be permanently wounded. Any injuries the user suffers immediately heal, even if the user's body is disintegrated or blown up or completely deleted, even if the user is completely destroyed to the sub-atomic level, they will still return to life. Alternatively, some users are absolutely immune to all harm, nor can they die of any natural causes.
User may still be able to feel pain.
Inability to die may cause user to descend into boredom and madness with the endless time.
User may not be able to escape elimination via timeline-manipulating powers.
Full powered nonexistence may wipe the user out of existence.
User is still susceptible to psychic attacks and can be rendered mentally inert by mental assaults.
Can be sealed in an empty dimension with no chance to escape.
Immortality Negation might be enough to kill the user.
Evangeline AK McDowell ( Negima!)
Fanoxean (The Young Guardians)
Kaguya Houraisan ( Touhou Project)
Fujiwara no Mokou ( Touhou Project)
Adam Destine ( Marvel Comics)
Raziel ( Legacy of Kain)
Garlic Jr. ( Dragon Ball)
True Immortals ( Baccano!)
Alucard ( Hellsing)
Sosuke Aizen ( Bleach); via Hogyoku
Free ( Soul Eater)
Jack Harkness ( Dr. Who/Torchwood)
Darth Plagueis ( Star Wars); only to other people
Hazama/Terumi Yuuki ( BlazBlue)
Wonder Man ( Marvel)
Thanos ( Marvel)
Dr. Victor Frankenstein ( Mary Shelley's Frankenhole)
Elizabeth Frankenstein ( Mary Shelley's Frankenhole)
Professor Sanguinaire Polidori ( Mary Shelley's Frankenhole)
Frankenstein's "Creature" ( Mary Shelley's Frankenhole)
Dust of Osiris ( Melty Blood)
Death ( Supernatural)
C.C. ( Code: Geass)
Sun Wukong ( Journey to the West)
Snow White ( Fables)
Goldilocks ( Fables)
Bigby Wolf ( Fables)
Jack Hoerner ( Fables)
Santa Clause ( Fables)
Sailor Cosmos ( Sailor Moon)
Madara Uchiha ( Naruto)
As agent of the Elder God, Raziel (Legacy of Kain) is beyond death.
After fusing with the Hogyoku, Sosuke Aizen (Bleach) gained both immortality and indestructibility.
Kaguya Houraisan (Touhou) gained this power after drinking the Hourai Elixir.
After making a wish on the Dragon Balls, Garlic Jr. (Dragon Ball) does not age and regenerates any and all bodily damage.
Thanos (Marvel) was banned by Death itself from entering its realm, and thus is unable to die in any way
Being a supernatural entity of immense power, Fanoxean (The Young Guardians) is virtually impossible to kill in any way.
Porky Minch, being trapped in the current timeline due to his abuse of time travel, cannot age nor die in anyway. He lived to the end of the world, and is still alive.
Deadpool (Marvel) has one of the most powerful healing factors in and was cursed to live eternally by Thanos.
Silas was a transformed into a true immortal one he'd drank the Immortality elixir. He is immune to all weapons, except for the cure for immortality.
Sailor Cosmos is the Sailor Moon's final form, she reached this level by unknown factors. She is considered to be a true immortal. (Sailor Moon)