[[quoteright:350:[[Webcomic/GirlGenius http://static.tvtropes.org/pmwiki/pub/images/zeetha_gg_9272.PNG]]]]
[[caption-width-right:350:Only a few of the possible expressions from Zeetha's headband.]]

An item that changes based on the expression or condition of its master, though it usually has no reason whatsoever to do it.

ExpressiveShirt is a SubTrope.

Related to EmpathyPet, which is the animal companion version of this trope. Compare to sister tropes ExpressiveHair, ExpressiveMask and EyeGlasses.
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!! Examples:

[[foldercontrol]]

[[folder:{{Anime}} and {{Manga}}]]
* The headbands on ''NininGaShinobuden''.
* Taking this concept to its logical extreme, it's not uncommon for HumongousMecha with humanoid faces to mirror their pilot's expression. ''Anime/TengenToppaGurrenLagann'''s mecha even ''lip sync'' to their pilots' dialogue. From the same series, Yoko's skull hairpin sometimes expresses her emotions, like when she realized that the men desperately needed a bath, the pin made a ">_<" expression while Yoko was holding her nose and pretty much doing the same.
** Also, note [[http://static.tvtropes.org/pmwiki/pub/images/Sans_titre.jpg this (NSFW) little incident]]...
* Chouhi from ''KoihimeMusou'' wears a tiger hairpin that always mimics her expression.
* In ''Anime/LuckyStar'', Tsukasa has her bow droop when she's sad in episode 18 and the OVA, and spike up when she's shocked in other episodes.
* Princess Snow's snowman pendant in {{MAR}}. It's a magic pendant, though.
* [[GenkiGirl Yuki's]] cat-belt… thingie in ''Manga/{{Saki}}''.
* The skull on Kuromi's forehead in ''OnegaiMyMelody'' does this.
* ''LightNovel/BakaToTestToShoukanjuu'': Minami Shimada's hair ribbon, as well as Himeji's bunny hair clips.
* {{Pita-Ten}} has the toy bunnies in Misha's hair frequently mirroring her emotions. The fancomic ''The KWM Championship'' (included in the ''Pita-Ten Official Fan Book Vol. 2'') played with this with Misha, after losing an important battle to Koboshi ([[ItMakesSenseInContext It Makes More Sense In Context]]), [[StepfordSmiler pretending to be as cheerful as ever...]]while her hairbunnies [[DeathGlare glare in a rather]] unsettling manner.
* Heihachi from SamuraiSeven has a little doll attached to the hilt of his sword that sometimes changes to reflect the general mood Heihachi was in at the time.
* Kuromi in ''OnegaiMyMelody'' and sequels. Her black joker-hat has a skull logo that corresponds to her mood change.
* Amu's [[HairDecorations hair pins]] in ''ShugoChara'' change whenever she character changes, with what she's changing to depending on who she changed with. Most other characters usually have a new accessory pop up out of nowhere.
[[/folder]]

[[folder:ComicBooks]]
* ComicBook/{{Asterix}}'s winged helmet.
** Parodied in ''Asterix and his Friends'', a compilation of comics by various FrancoBelgianComics artists drawn as a tribute to Uderzo. One story imagines the characters in an alternate universe based on medieval Germany, where Asterix complains to Getafix (a wizard in this universe) that the enchantment on his magic helmet has worn off and the wings no longer move whatever expression he makes.
* Adam Warren has used this in several of his works. Considering that most of these involve high tech adventures, there are some allowances. Sometimes a tag on the shirt expressly says that it can do this.
** When he was illustrating for Gen13, the winged skull tattoo on Grunge's chest exhibited Expressive Shirt tendencies.
* There was a character in ''ComicBook/TheMask'' who was a huge fan of “Big Head” (that's what everyone calls whoever is wearing the mask at the time) and had a picture of Big Head on the back of his jacket. After he actually got the mask himself, the picture on the back of his jacket changed to his own face, and basically became this trope.
* In ''Franchise/{{Batman}}'', the "ears" on Harley Quinn's hat often go up or down like dog ears depending on her mood; may overlap with ExpressiveMask.
** Or ExpressiveHair, as without the hat her twintails do the exact same thing. They're probably stuffed in there.
* ComicStrip/{{Dilbert}}'s tie.
* Wade Duck's inflatable water toy from ''USAcres''.
* In ''GrooTheWanderer'', the head of the Minstrel's lute changes into a different object in every panel. Admittedly, not necessarily based on his emotional state, though.
* ''The Intimates'' features Sykes, an extremely powerful psychic who has a "null field" around his head to keep his powers in check. Sykes doesn't talk, but his null field takes different shapes depending on what he's doing at the moment -- for instance, a camera, when he's paying close attention to a lecture.
* In ''ComicBook/FiveWeapons'', Joon the Loon's eye patch can match whatever mood she is feeling at the time thanks to her psionic abilities.
[[/folder]]

[[folder:FanFiction]]
* In the ''VisualNovel/AceAttorney'' fancomics on [[http://hiimdaisy.livejournal.com/ this blog]], the pin on Phoenix's hat tends to change its expression to match his. Same with [[spoiler:the face-like scar on Kristoph's hand.]]
* One of the most stereotypical CommonMarySueTraits is eyes that change color to reflect different emotions. Why anyone would want to have their emotions so blatantly on display is a mystery, as is why other characters don't think to exploit this trait to become TheEmpath.
[[/folder]]

[[folder:VideoGames]]
* In ''VideoGame/PaperMario'', the clouds Lakilester and his girlfriend Lakilulu ride on match their expessions.
* ''VideoGame/BlazBlue'': Litchi Faye-Ling (aka [[GagBoobs Booby Lady]])'s hair pin is an animate (or possibly living) tiny panda. It occasionally moves on it's own, sometimes even leaping between her cleavage after a match (with her laughing about it).
* ''VideoGame/TheSecretOfMonkeyIsland'': Meathook's skull tattoo may be something of an edge case, since he does that on purpose.
* Occassionally, Suwako's hat in the ''VideoGame/{{Touhou}}'' series. Her defeat picture in the fighting games, for example, has its googly eyes crying in pain. Fanworks, naturally, take this to the extremes, to the point that her hat has gained its own FanNickname of Pyonta.
* Gust's hat from ''VideoGame/{{Neptunia}}'' has a grand total of two expressions: l l and ><
* ''[[VideoGame/TheLegendOfZeldaOracleGames The Legend of Zelda: Oracle of Ages]]'': The Maku Tree's flower droops when she's sad.
* In ''VideoGame/SuperSmashBros for Wii U and 3DS'', Bowser Jr. and the Koopalings' Koopa Clown Cars change expression when they're attacking or being attacked.
[[/folder]]

[[folder:Visual Novels]]
* A couple of examples in the ''VisualNovel/AceAttorney'' series:
** Moe, the clown from case 2-4, wears a hat with a mouth on it that mimics his expression.
** In a more bizarre example, Shelly de Killer communicates in case 2-5 through a walkie-talkie that looks a bit like his face and which changes expressions to match his mood. In the second ''Investigations'' game, he carries around an ice cream cone that resembles his face[[note]]It's two flavors, split down the middle like his stitched face, with a smaller cone "nose" and a cherry "monocle."[[/note]] that acts similarly, [[TheStoic while he himself remains impassive]].
** When she isn't using it, [[VisualNovel/PhoenixWrightAceAttorneyDualDestinies Athena Cykes]]' Widget turns into this. This particular case is fully justified since it's an electronic device explicitly designed to read emotions.
* When Kouri of the VisualNovel ''BrassRestoration'' is in her plain clothes, her bear purse mirrors her expression.
[[/folder]]

[[folder:WebComics]]
* [[MetalGearSolid3 Big Boss']] alligator hat in ''[[{{Hiimdaisy}} Let's Destroy the Shagohod!]]'' which cries alongside the user.
-->''T-The Boss and I used to make bad puns together... T_T''
* Zeetha in ''Webcomic/GirlGenius'' wears a headband with a face on it that mirrors her facial expressions. For [[http://www.girlgeniusonline.com/comic.php?date=20080409 example]]... Otherwise identical faces on her harness don't do this, nor those on her swords. The similar one on the ''Baron's'' sword, however... This appears to be a Skiffandrian art.
** More generally this is a quirk of PhilFoglio's style and can be found in other works as well, including ''XXXenophile''.
* The hat of Eric in ''Webcomic/{{Loserz}}''. He himself is unaware of this, as it says only "StarWars" when he's not wearing it, although his friends occasionally notice it change.
* ''TheZombieHunters'' has Jenny's [[IconicItem signature]], [[NumberOneDime much-loved]] orange bear [[NiceHat hat]].
* ''Webcomic/EerieCuties'' even mentioned Layla's skull-shaped "emotive hairpin" on the cast page.
** Stephanie Kane of ParanormalMonsterSquad has the "sister" to that hairpin in the "Lingonberries" two-part crossover with EerieCuties (gifted to her by Layla). It enables Layla to know how Steph's doing (one crossover strip had Layla's pin have X's for eyes--meaning Steph was in life-threatening trouble).
* ''{{Homestuck}}'': The expression on Nepeta's cat hat matches her own.
* Tiffany from ''Webcomic/{{Precocious}}'', wears a smiley-face pin whose expression occasionally changes [[http://www.precociouscomic.com/archive/comic/2011/06/26 to match]] [[http://www.precociouscomic.com/archive/comic/2012/03/02 its wearer's mood.]]
* Lakitu's cloud in ''Webcomic/BrawlInTheFamily'' [[http://brawlinthefamily.keenspot.com/2012/10/23/442-lakitu/ #442: Lakitu]].
* In TheWotch, Evan's shirt has a big "'''[[http://www.thewotch.com/?date=2005-05-27 E]]'''" on it (Most characters call him E). When he turns into a [[http://www.thewotch.com/?date=2005-05-30 4-year old girl,]] it changes to a ''lowercase'' "'''e'''", and most people call him Lilly (Lil' E). During Chapter 17: Adventures in Babysitting, when Lilly gets a magical age-up to her teens, her shirt has a [[http://www.thewotch.com/?date=2006-04-21 cursive, lowecase "l".]]
** It is worth noting that at first, Lil'E's shirt still has an uppercase E on it and she is basically Evan as a hyperactive 6-year-old girl. As Lil'E turns into Lilly, developing a separate personality who occasionally shows up in Evan's thought bubbles, her dress starts showing the lowercase e. And "Missy" (Miss E) is teenage Lilly, ''not'' simply female Evan, hence the "l" instead of an "e"
* From ''Webcomic/GunnerkriggCourt'', Antimony infiltrates the robot basement using a [[PaperThinDisguise clever disguise]] her fake antennae are seen [[http://www.gunnerkrigg.com/archive_page.php?comicID=212 drooping]] with her emotions.
* Webcomic/MeatShield: Dhur's belt buckle
[[/folder]]

[[folder:WesternAnimation]]
* Wade the Duck on the ''USAcres'' segments ''GarfieldAndFriends'' wears an innertube with a ducky on it that mirrors his facial expressions. This trait carried over from the little-known ''U.S. Acres'' strip.
** Jim Davis must have liked this trope. In the Garfield Halloween special, Garfield wears a pirate hat with a skull and crossbones that mirrors Garfield's expression. At one point when the boat Garfield's in with Odie capsizes, the skull and crossbones jumps off the hat and swims away.
* In Disney's version of ''Little Toot'', the title character (an anthro tugboat) had a steam whistle that mirrored his expressions.
* The Chuck Jones cartoon ''The Bear That Wasn't'', based on a book by fellow ''WesternAnimation/LooneyTunes'' director Frank Tashlin, has a factory foreman whose photo ID has the same expression that he has.
* Unterbheit minion Catclops of ''WesternAnimation/TheVentureBrothers'' has a single cat on his forehead instead of an eye; the cat generally shares his expression.
* On ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', Apple Bloom's bow is like this, drooping when she's in a funk (as seen near the beginning of "The Cutie Pox").
* [[TheSimpsons Simpsons]] writers and animators love using cigarettes and cigars to telegraph character reactions. A smoker--typically Krusty, Lunch Lady Doris, or Patty and/or Selma--is nonplussed by a statement or event, but remains impassive. The only indication of the smoker's feelings is ash falling off of his cigar.
* ''WesternAnimation/TransformersPrime'' does this with [[KibblesAndbits robot kibble.]] Starscream's wings droop when he's frightened or sad. Bumblebee's door wings are much the same way (and it really helps since he can't talk).
* In the ''WesternAnimation/PhineasAndFerb'' episode "Brain Drain" Isabella's bow goes droopy when she's sick.
* In ''WesternAnimation/AlbertTheFifthMusketeer'', Milady de Winter's fleurs de lis tattoo changes appearance to that of a duck, its expression often matching hers.
[[/folder]]

[[folder:RealLife]]
* TruthInTelevision: [[TheSixties Mood Rings]]
* A popular item available at anime cons is a pair of cat ears that are animated, changing with the wearer's brainwaves based on a sensor on their forehead. These different modes are supposed to correspond with emotions, but reports are mixed for how accurately they do this.
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