'''Basic Trope''': A character's age is left unclear.
* '''Straight''': Alice appears to be somewhere in her teens, but her exact age is never made clear.
* '''Exaggerated''':
** Alice is an immortal who frequently speaks about historical events as if she was involved in them. Just how far back her knowledge goes is unknown.
** Alice has the body of a preschooler, but is a veteran of the American Revolution.
* '''Downplayed''': It's obvious that Alice is an underclassman in high school, but it's never specified whether she's a freshmen or a sophomore.
* '''Justified''':
** Alice is an amnesic shapeshifter who appears to subtly grow younger and older based on circumstances, not even she knows her true age.
** Alice is a time traveller, and all her time warping made her forget when she was born.
** Alice is insecure about her age, leading her to keep it secret.
** [[DoorstopBaby Alice was found in a basket]].[[note]]While it's difficult (if not impossible) to determine how old she was at the time, for legislative purposes her adoption date minus one year is used as her birth date.[[/note]]
** Alice was born into an isolated tribe deep in the jungle, so no official documentation of her birth date exists.
* '''Inverted''':
** Everyone's age is seen above the heads of everyone thanks to Alice's powers.
** When Alice is introduced, she is stated to be exactly fifteen years, eight months, twelve days, six hours, seventeen minutes old... [[LudicrousPrecision and eight seconds]].
* '''Subverted''': Alice appears to be somewhere in her teens, but her exact age is never made clear. Until, halfway through the series, she tells Bob she's sixteen.
* '''Double Subverted''': Alice said she was sixteen, but it's implied that she was lying.
* '''Parodied''':
** Alice goes to get her driver's license and gets rejected for being too young. Frustrated, she goes to an American bar, shows her ID and [[DrowningMySorrows orders a drink]].
** Not even Alice knows how old she is.
** Anyone who attempts to figure out Alice's age either dies or goes insane.
* '''Zig-Zagged''': Alice has reincarnated and kept her memories several times although it is uncertain how long the other lives were. When asked she explicitly says, "You'll have to be more specific."
* '''Averted''': The character's age is explicitly stated.
* '''Enforced''':
** "The marketers wouldn't let us say that Alice is thirteen out of fear of losing one demographic or another."
** The creators leave Alice's age open to interpretation in order to increase the number of stories she can star in and so that more audience members can relate to her.
** The author was unsure of what age the character was and went with this to help broad audiences identify.
** Alice is only a background character, the author didn't put much thought into her beyond her (limited) role.
* '''Lampshaded''' Bob asks Charlie how old Alice is, and he responds: "Weird, I've known her for five months and nobody's ever told me how old she was.
* '''Invoked''': Alice gives everyone conflicting details on her age and birthdate just to mess with them.
* '''Exploited''': Alice is an infiltrator who uses her ability to plausibly pass as different ages to shift through varied identities and make following the trail harder.
* '''Defied''': Bob steals Alice's ID card to find out her age.
* '''Discussed''': "I'm not sure if [[DarkActionGirl Alice]] really is a teenager or just an adult with serious issues."
* '''Conversed''': "Isn't Jake a bit young to be leading an army?" "I thought he was too old!"
* '''Played For Laughs''':
** Alice appears to be college-aged, but it's stated she's in high school. She's also a ditzy comic relief character, implying that she got held back.
** Very frequently dialogue appears to being leading in to Alice's age but the topic is always changed.
* '''Played For Drama''': Alice makes her age deliberately vague, because she's got an older, abusive boyfriend and people are trying to break them up through [[JailbaitTaboo age-of-consent laws]].
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%%* '''Implied''': ???
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%%* '''Plotted A Good Waste''': ???