[[quoteright:350:[[Series/OnceUponATime http://static.tvtropes.org/pmwiki/pub/images/ouat_anna_hair_down.jpg]]]]
[[caption-width-right:350:Despite the {{fairytale| wedding dress}} [[PimpedOutDress dress]], her hair lets us know she's not a [[PrincessClassic stereotypical princess]].]]

Generally, the most important things an author wants to communicate to an audience are the things that are difficult to instantly demonstrate, such as a character's role in the story, personality, moral character, or whether the author wants the audience to sympathize with them.

Often as a visual shorthand, the writer uses the character's appearance to symbolize those characteristics. In animation, a common practice is to use HairColors, or the color and [[TaremeEyes shape]] of the [[TsurimeEyes eyes]]. However, another technique that has several useful advantages is the style and length of a character's {{hair| tropes}}. For one thing, it's relatively easy to implement in LiveActionTV as well as animation. It's also convenient for characters who undergo lots of character development as you can give them an ExpositoryHairstyleChange or ImportantHaircut.

Note: while HairTropes are all tropes that have to do with hair, this is specifically a supertrope of cases where hairstyle is used to represent personality, not simply to look interesting or help you tell the characters apart.

Compare StockCostumeTraits, where a character's costume indicates profession & status.
A SuperTrope to:
* BaldWomen: Often found in SciFi, these characters tend to represent empowerment through transcendence.
* BoyishShortHair: Short, unkempt, or spiky hair, often used to indicate {{tomboy}} types, and {{action girl}}s.
* BraidsOfAction: A single long braid or a pair of braids, used to indicate an ActionGirl.
* GirlishPigtails: Hair tied into sidetails that stick out the sides indicate youthfulness or immaturity.
* HairyGirl: A girl with more body hair than considered normal, indicating unattractiveness and/or unkemptness.
* HimeCut: Combination of a female with perfectly straight and even bangs, noticable sidetails, and long hair in back indicates an {{Ojou}}.
* LongHairIsFeminine: Long hair used to establish the femininity of a female character.
* MegaTwintails: Outrageous GirlishPigtails twirled into RegalRinglets indicates a character who combines the two types.
* MotherlySidePlait: A loose plait or braid resting on the shoulder to indicate motherhood with a sweet character.
* OdangoHair: Two spherical buns worn at about 45 degree angles on the side of the head, sometimes with ribbons and/or cloth covers. Indicates the character is either Chinese, innocent and polite, or when worn with twintails, a {{tsundere}}.
* OjouRinglets: Curly sidetails on female characters often indicate royalty or being of (or formerly of) high status.
* PowerHair: Short hair reaching the jawline, parted in front and coiffed expertly so it never crosses in front of the face, used to indicate an IronLady.
* PrimAndProperBun: Hair tied in a single bun at the back, indicating a neat, prim, proper, and organized woman of authority, who is typically conservative and tight laced.
* RapunzelHair: Very long hair (past their hips) that flows like a cape is often used to indicate a dramatic character from a wealthy background.
* RegalRinglets: Corkscrew curls as a sign of a character being upper class.
* ShortHairWithTail: Combining the femininity of long hair and the ActionGirl / {{Tomboy}} implications of short hair.
* TomboyishPonytail: Wearing a ponytail not intended for elegance indicates a {{Tomboy}} or TheLadette.

* BaldBlackLeaderGuy: The combination of dark skin and baldness indicates an often mysterious, heroic authority figure, often the BigGood.
* BaldOfEvil: Bad guys are often completely bald.
* BarbarianLonghair: Long, unkempt hair as a symbol of wildness or badassery.
* BraidsOfBarbarism: HornyVikings and other barbarians.
* DreadlockWarrior: Dreadlocks are preferred by tough fighters.
* HotBloodedSideburns: Sideburns that look like a flame indicate a HotBlooded character.
* LongHairedPrettyBoy: Long hair used to emphasize the character's status as a PrettyBoy.
* SailorsPonytail: Sailors wear their longish, often unkempt hair in a low ponytail.

!!Unisex (same implications for both genders):
* BaldOfAwesome: When hair loss isn't a sign of a character's lack of youth, health, or morals, it's a sign of awesomeness.
* BlindingBangs: A mop of hair that obscures the eyes, usually used to indicate that a character is dumb, a ShrinkingViolet or TheStoic.
* DelinquentHair: Unnatural hair color or styles used in a more realistic setting to denote a {{delinquent}}, antisocial, or rebellious individual.
* ExpositoryHairstyleChange: Hairstyle change signals a characterization change.
* GoodHairEvilHair: When this supertrope is used specifically to distinguish heroes and villains.
* HairAntennae: Two locks of hair that stick out above the head, resembling an insect's antenna, used to indicate TheDitz.
* HornedHairdo: A hairstyle that looks like horns is usually a sign that the character is up to no good.
* IdiotHair: A single lock of hair that sticks straight up, indicating a foolish, naive, or mischievous individual.
* MessyHair: The go-to style for eccentrics or those who don't care about their looks.
* PeekABangs: Hair covering one eye, used to indicate a character who is either seductive, deceptive, shy, or angsty.
* PrematurelyGreyHaired: Grey hair on a person too young to have it naturally indicates severe trauma in their past.
* QuirkyCurls: Characters with completely curly hair (not just RegalRinglets) tend to be energetic, quirky, rebellious and/or eccentric.
* SamuraiPonytail: This character is nobility whether they act it or not and probably a badass.
* SpikyHair: A combination of wild, cool, and Badass.
* VillainousWidowsPeak: A distinct point in the hairline in the center of the forehead indicates a villain.
* WildHair: Shaggy, unkempt, long hair, used to symbolize that a character is close to nature.