History Main / ImmortalityBeginsAtTwenty

*** The really bad part about that though is that because, as stated early in the page, maturity and old age are caused by different things in your body so this might she might not actually live any longer than normal.

* In the AD&D 2nd Edition setting ''Birthright'', people can inherit divine bloodlines, which are generally assumed not to manifest until puberty. One such power is extreme long life, from five to 'one hundred' times longer.

* The Phoenix Saga of ''RanmaOneHalf'' has both versions of this. Usually the bird takes a hundred years to grow up, but if you forcefeed it enough it'll mature faster.

* Played with in ''{{Hellsing}}''. Alucard was in his mid-forties when he died (just like the RealLife Dracula), but has the appearance of a man in his twenties because he is powerful enough to assume pretty much any form he wants. When his full power is unlocked, he resumes his original appearance (complete with [[BadassMustache mustache]]), but quickly resumes his usual form (and later the form of a [[GenderBender twelve-year old girl]]). The artificial vampirisation process used by [[{{Ghostapo}} Millenium]] also restores their soldiers to a youthful state [[spoiler: most notably with Walter]]. Played straight with [[FriendlyNeighbourhoodVampire Seras]].

* Semi-averted in ''{{Fables}}'': Characters in {{Fables}} tend to be immortal at whatever age they are known as (except Pinocchio, who is explicitly a boy due to the wording of his request and not his in-universe ContractualImmortality). However, many of these ''are'' approximately "late 20s", so it reaches the trope from an opposite direction.

* In the MercyThompson books, all werewolves look to be in their early or mid-twenties, no matter old they were when they were turned. The only naturally born werewolf stopped aging in his mid-twenties, as well. This is stated to be part of their healing and disease resistence magic.

* In Joanna Bertin's Dragonlords trilogy, Dragonlords are humans born among humans but utterly sterile, birthmarked, and with half-dragon souls; at some point these dragon souls manifest and the Dragonlord is stronger and more magical than most humans as well as able to transform into a dragon, and from that point on they age incredibly slowly. Typically they manifest in the twenties or thirties. In ''The Last Dragonlord'', the Dragonlord mentioned in the title is also called "Little One" because he's the youngest, at six hundred years old. Their leader manifested unusually young, at sixteen, and by this point is visibly old. The little one wonders about just how long she's been alive but doesn't ask.

** Which is addressed in the game itself. [[spoiler: Hokuto and Sara, Tsugumi and Takeshi's children, are said to NOT be immortal (though this was only because at the time, Takeshi was not immortal yet.).]]

* The [[HalfHumanHybrid branded]] in the ninth and tenth FireEmblem games age according to their beorc heritage until they turn [[DangerousSixteenthBirthday sixteen]], at which point their aging proccesses slow down to match their laguz heritage.

** However at least the runes allow bearers to hit puberty before the whole immortality thing sets in. Otherwise characters like Luc and Sasarai who are implied to have had their runes since birth would still be infants. The theory is that the rune stops aging at its prime as defined by JRPG standard (ie mid to late teens).

* ''TouhouProject'', especially in fanon, plays with this trope for all it's worth, thanks to it's LoadsAndLoadsOfCharacters who are ReallySevenHundredYearsOld. The scarlet sisters were born vampires, and CantGrowUp, as are all of the fairies in the series, who are refered to in ''Perfect Memento'' as having at most the appearance of a 10-year-old child. Most of the others, however, are adults who have lived thousands of years, and include some apparent teenagers who are truly immortal. Yukari, especially, (thakns to dressing up and occasionally playing like a younger woman than she appears to be normally) gets jokes from fandom about being the "old maid" (in spite of only being a couple thousand years old, which is fairly normal by Touhou standards) by some corners, and having her boast that she's (eternally) seventeen by others.

* Neo Queen Serenity of ''{{Sailor Moon}}'' stops aging at age 22.

* In ''KamenRiderDouble'', Philip [[spoiler: died at age five and then was resurrected as a stream of data composed as the memories of the Earth.]] Towards the end of the show, he's confirmed to be seventeen years old, but Delusion Diary #11 hints that he won't age beyond that [[spoiler: because his body is made of data.]] It may or may not be true given that the scene was part of Shotaro's daydream.

* In {{Pandect}}, Aces (animals with human souls and the ability to switch to a human body) stop aging entirely in their animal bodies, and the human body ages to about mid-20s and then remains there for the rest of their (very long) lives. Justified in that they have to earn Ace: the prolonged period of youth is part of the reward.
* [[{{Touhou}} Remilia and Flandre Scarlet]] are members of a Vampire-race who forfeit growth and maturity in exchange for immortality. It is never specified at which age this starts, but the Scarlet sisters are 500 years old and look like they are kids.
* Genetic elites in TheCyantianChronicles, though their age catches up to them quickly as they reach the end of their lifespan (ranging from 120 years in foxes to nearly a millennium in wolves).
* Very common with the long-lived races in DanAndMabsFurryAdventures, pretty much every creature race that looks like beings effectively stops aging in their 20s.

* How is DanAndMabsFurryAdventures not here, pretty much every creature race that looks like beings effectively stops aging in their 20s.

** Also Claire and Sylar.

** But the ears and nose don't entirely stop growing until death. So an immortal human would look about twenty from the neck down – until their ears grew down past their neck. They might eventually need a nose job to keep breathing.

* After her powers manifested, [[ParasiteEve Aya Brea]] actually got physically younger. While she actively refused to use her abilities between games, by the time ''Parasite Eve II'' rolls around, Aya is permanently 21.

** But the ears and nose don't entirely stop growing until death. So an immortal human would look about twenty from the neck down – until their ears grew down past their neck. They might eventually need a nose job to keep breathing.

** But the ears and nose don't entirely stop growing until death. So an immortal human would look about twenty from the neck down – until their ears grew down past their neck. They might eventually need a nose job to keep breathing.

->-- {{Things Mr Welch Is No Longer Allowed To Do In An RPG}} [[http://theglen.livejournal.com/282764.html #1616]