Did you ever notice how many supernatural abilities, superpowers, or forms of MagicByAnyOtherName are controlled by emotion? Kind of a part of MagicVersusTechnology where Magic is emotional, and Technology is rational. In other words, you're about to learn exactly why you have to BewareTheNiceOnes.

A more general version of DefenceMechanismSuperpower and TraumaticSuperpowerAwakening without the required danger, Emotional Powers manifest themselves through emotion in the characters. What the emotions are will vary.

A character trying to work out HowDoIShotWeb may learn that the answer is DontThinkFeel.

Compare WildMagic. Supertrope to AngstNuke and YouWouldntLikeMeWhenImAngry. Compare and contrast with PsychoactivePowers and PersonalityPowers. Not to be confused with EmotionBomb.

[[folder:Anime and Manga]]
* In ''Manga/AhMyGoddess'', although Goddesses have full control over their powers, emotion sometimes trigger unconscious outbursts of magic. For example, Belldandy loses control on herself when she gets jealous of other women flirting with Keiichi.
* A short manga story titled "Shouko of the Twilight" had the title girl making a contract with a vampire for magic. After futile attempts at MundaneUtility, Shouko loses her temper at the vampire...and it's discovered the magic is directly tied to her anger.
* [[TheBerserker Natsu]] of ''Manga/FairyTail'' is an example of this, as the ''[[UnstoppableRage flame of emotion]]'' that is the source of power for his Dragon Slayer magic causes him to actually become stronger the angrier he gets.
** The same goes for other dragon slayers though [[PlayingWithFire Natsu is just such a]] [[JustForPun hot head]] it's more noticeable.
** Even the Juvia's magic power work in this way and in her is even more evident than Natsu.
* In ''Manga/RanmaOneHalf'', KiAttacks are focused via the emotional state of the user (regardless of the type of emotion), and the deeper the emotion felt, the more powerful the attack. Also, the CounterAttack "Hiryu Shoten Ha" requires that the user be calm while the opponent is excited/enraged.
* This is often implied in ''Manga/NurseAngelRirikaSOS''. No one talks about it in-universe, but the heroine's attacks are more dramatic when she's angry or has tapped into a new well of HeroicResolve. Her ChildhoodFriend[=/=]sidekick often exhibits {{Defence Mechanism Superpower}}s.
* The power of Hokuto Shinken from ''Manga/FistOfTheNorthStar'' is directly proportional to how angry its user is. At normal levels of anger, Kenshiro can break concrete with his fists. At full power, he can explode a goddamned TANK by punching the driver.
* ''Anime/PuellaMagiMadokaMagica'' has [[spoiler: the characters' emotional stability double as their {{Mana}} meter. Accumulating too many negative feelings and/or overexerting from too much magic use causes the user to transform into an EldritchAbomination that has to be killed by its former comrades.]]
* ''Manga/DragonBall'' Anyone with Saiyan blood has the potential to reach new levels of strength if sufficiently enraged. Human/Saiyan [[HybridPower hybrids]] find it easier to pull off since by default it's in a Saiyan's nature to repress their emotions, while their human half nullifies this out.
* ''Manga/{{Bleach}}'': Orihime's power to [[RealityWarper reject fate]] is directly tied to her emotions. Unfortunately, being an ActualPacifist limits her combat abilities since her one offensive skill runs on KillingIntent. Which she doesn't have a whole lot of.
* ''Franchise/KagerouProject'': All of the protagonists' powers were created when Azami, the original Medusa, felt strong emotions; for example, [[spoiler:her offensively powered snakes were all born from the pain, confusion and anger when humans tortured her]]. Even when one of the leads has their powers under control, strong emotions can make them use it by accident.
* Shigeo Kageyama from ''Manga/MobPsycho100'' tries to keep his emotions firmly under lock and key due to the fact that feeling strong emotions can amplify his powers, something he has a decent reason to fear. However, this isn't always easy, and when put under enough emotional stress (represented as a percentage of how close he is to one of these psychic events), he enters "100%" mode and his powers and personality become amplified and altered by whichever emotion he's feeling most strongly at the time.
* Though not outright stated, the powers seen in ''Franchise/PrettyCure'' are implied to be ran on emotional states. Some notable examples:
** In TheMovie of ''Anime/FutariWaPrettyCureSplashStar'' have Saki and Mai's Cure forms cut out on them as they get into a terrible argument. Once they realize the error of their ways, apologize and mend bridges, their powers return.
** Karen of ''Anime/YesPrettyCure5'' was actually ''refused'' her powers the first time around because she wanted to act on selfish reasons. A change of heart thanks to a very determined Nozomi finally gets her her powers.
** Tsubomi of ''Anime/HeartCatchPrettyCure'' fluctuates in power because of her rebuilding self-esteem. By the end of the series, she's still pretty weak, but she makes up for it with the bonds made by her friends.
** Part of the initial storyarc in ''Anime/SuitePrettyCure'' had Hibiki and Kanade trying to work together as friends and Cures after finally overcoming an initial incident that ended their friendship. Since they need to be "in harmony" to get their powers to work properly, this is initially tough.
** Hime of ''Anime/HappinessChargePrettyCure'' is incredibly weak, having started out as a sheltered, shy and selfish princess scared out of her mind by the monsters [[spoiler:she accidentally released]] and having what little self-esteem she has left crushed by Cure Fortune making sure she NeverLiveItDown. She gets better as time goes on, earning herself friends and gaining the confidence to overcome her fears. Also doesn't hurt that Cure Fortune eats a hefty helping of humble pie later on.
** Doubled down in ''Anime/HugttoPrettyCure'' as Homare is initially refused her powers due to her fear of failure stemming from a past trauma, which she ends up overcoming. Later on, Hana is hit with depression when she realizes that she's just a JackOfAllStats and has nothing unique going for her that it prevents her from transforming.

* In ''Comicbook/{{Watchmen}}'', Dr. Manhattan makes a ton of people around him asking questions disappear when he is really stressed.
* In ''ComicBook/PaperinikNewAdventures'', there's Xadhoom: According to what she says, if she ever loses control of her powers, she would ''GO NOVA'', and [[FromBadToWorse then she would become a black hole and swallow the entire solar system she's occupying]].
* TheHulk. You wouldn't like him when he's angry.
* On a related note, when ComicBook/SheHulk gets scared, she Hulks Out.
* Creator/DCComics has a whole slew of "Lanterns" from the modern GreenLantern mythology whose powers, via the entities from the [[ColorCodedEmotions Emotional Electromagnetic Spectrum]], are based on their ability to feel and channel certain emotions; the two most notable in the context of this trope however are arguably the Star Sapphires (who apparently need to [[ThePowerOfLove feel love]] to even have, let alone use their powers) and the Red Lantern Corps, whose powers are likewise fueled by UnstoppableRage and who are [[StartOfDarkness recruited]] and given [[PowerBornOfMadness superpowers]] by their [[GreenLanternRing Power Rings]] in the first place only ''after'' they've hit an irrevocable RageBreakingPoint

* ''Literature/CircleOfMagic'': Ambient magic is tied to the user's emotions. Niko starts training Tris before the other students, telling her that when she gets mad, bad things happen. He's not wrong.
* In the original novel of ''{{Literature/Matilda}}'', her telekinesis first appears when she grows uncontrollably angry over being (loudly and violently) accused of something she did not do.
* The ''Literature/HarryPotter'' series often has bouts of involuntary magic happen to younger wizards in moments of strong emotion.
** Also, the Patronus Charm can only be cast by focusing on a very powerful happy memory.
* In ''Literature/TheDresdenFiles'', emotions can be a serious source of fuel for magical ability. In ''Literature/WhiteNight'' in particular, Harry saves himself and another character by having the other character - [[HornyDevils a succubus]] - kiss him and supercharge his spells with lust. In ''Blood Rites'', Murphy asks Harry why he just doesn't do the "pocket full of sunshine" trick on the Red Court vamps. Harry states that it turns out you have to be genuinely happy to make the spell work.
* ''Warbreaker'' used hair changing colours with emotions for the royal family.
* In ''Literature/TheUnderlandChronicles'', Gregor has rager outbursts when he is angry.
* ''Literature/{{Manifestation}}'': One of the main characters displays this. [[spoiler: Gabby Palladino radiates a field of magical energy, which gets stronger when she is emotional. The effect is noticeable at key points throughout the story, but most noteworthy is when she kills a boy by overloading him with mana in a moment of sheer rage.]]

* ''FanFic/{{Bird}}'' features this as a major theme. There are several parahumans that have an emotional element, Elle might be the best example, actively shaping her imaginary worlds using her emotions as a blueprint. On the other end of the spectrum, Mimi's powers directly alter her brain chemistry, encouraging reckless behavior and inducing a state that is not unlike Sociopathy or Psychopathy.
* ''Fanfic/ChildOfTheStorm'' has Harry as a particular example, largely because he's psychic - due to his tendency to bottle up his emotions until he masters his powers, he tends to have a fairly epic case of PowerIncontinence whenever he loses control of said emotions. The results of this can vary from giving a fellow psychic a nasty PsychicNoseBleed and/or causing every object in a room to start floating, to accidentally trapping himself in a memory of a vicious superpowered pitched battle where YourMindMakesItReal. It is the latter instance that convinces him that he has to learn how to control his powers, because if he doesn't, he ''will'' end up doing someone permanent damage.
** More generally, when he gets angry the air tends to heat up around him and his powers pack significantly more of a wallop when he's angry. As of the sequel, if he gets ''really'' angry, a smell of wood-smoke begin to develop. This is generally an excellent time to start running.

[[folder:Films -- Animated]]
* In ''Disney/{{Hercules}}'', Hades' ordinarily blue FlamingHair flares up and turns orange when he's angered. When he hears that his heroic nemesis is still alive, he incinerates part of a forest in a flash fire.
* Elsa's [[AnIcePerson powers of ice and snow]] in ''Disney/{{Frozen}}'' go haywire when she feels fear or anxiety. Unfortunately, her parents' attempts to help her control them do more harm than good; because she's kept isolated and encouraged to "[[ArcWords conceal it, don't feel it,]]" Elsa ends up bottling up her emotions and avoiding almost all contact with those she loves. The end result is a massive panic attack that plunges the kingdom of Arendelle into EndlessWinter. [[spoiler:Fortunately, as Anna helps her discover, [[ThePowerOfLove genuine love]] lets her not only control her powers, but reverse their effect completely.]]

[[folder:Films -- Live-Action]]
* In the ''StarWars'' movies, Jedi focus their Force training on calming the mind and keeping emotions under control. The Sith focus their Force training on exploiting emotions.
* In ''Film/{{Ghost}}'', Sam seeks out the subway ghost and refuses to leave until the other ghost teaches him how to actually touch and move solid objects. The secret involves gathering up as much intense emotion as he can - good and bad - in order to move things around:
-->'''Subway Ghost:''' You've gotta take all your emotion, all your love, all your pain and push it way down deep into the pit of your stomach and let it explode like a reactor. Pow!
* In the film version of ''Film/{{Matilda}}'', Matilda's telekinesis first displays itself when her father rips up her library books and tries to force her to watch TV with the rest of the family.
* ''Film/XMenFilmSeries''
** ''Film/X2XMenUnited'': Discussed by Jean Grey and Scott Summers. She dismisses her short bursts of PowerIncontinence as stress; he says her nightmares make the whole bedroom shake.
** ''Film/XMenTheLastStand'': When Storm is upset, the clear sky suddenly turns into a very cloudy one.
** ''Film/XMenFirstClass'':
*** Erik Lehnsherr is originally only able to use his powers when extremely angry. The first two times, it involves maternal separation. However, he can't properly focus it until Charles coaches him to concentrate on happier emotions.
*** Raven Darkholme's mental state influences the effectiveness of her mutant ability. [[note]]While Raven had intentionally used her powers in that scene, Charles seemed to accept that she does sometimes lose control.[[/note]]
---->'''Raven''': You know I can't control it sometimes if I'm stressed or I'm tired.
** ''Film/XMenDaysOfFuturePast'': In the "X-Men Unguarded" group discussion on ''The Rogue Cut'' Blu-Ray/DVD, Creator/JamesMcAvoy explains why his character's distress causes his telepathy to go haywire, and more specifically, why [[Characters/XMenFilmSeriesProfessorCharlesXavier Xavier]] can no longer separate everyone else's pain from his own.
--->"[...] Charles as I've had the opportunity to play him, is a voyeur. So he's a genius, and he's got this ability to read people's minds. But his real power is a very human thing, his real gift is empathy. He can empathize with people's problems and he can help them. But as a young man, I think, certainly the way I tried to play him, is that he was much more kind of like a posh guy fascinated with working class guys. [...] And then what happens in this movie and the end of [''First Class''], you give him his angst, you give him his thing that makes him just like everyone else. And therefore he can't be a voyeur inside people's minds anymore. He's a passenger on the same train, and the train is going to hell."
** ''Film/XMenApocalypse'': Because of her insecurities, Jean finds it exceedingly taxing to deal with her telepathy [[spoiler:and her increasingly unstable "dark power." With the Professor's guidance and encouragement, however, she learns to let go of her apprehension at a critical moment during the climax, and Jean's newfound assertiveness enables her to achieve total dominion over the Phoenix.]]
* In ''BatmanAndRobin'' Poison Ivy's plants respond to her emotions and desires. When Robin was lured to her lair so she could seduce him the plants helped set the romantic mood by slowly closing behind him as he journeyed deeper into the lair and when he finally reached the center several leaves moved out of the way and a giant rose bloomed revealing Ivy, like curtains closing and opening. After Ivy became angered after discovering that Robin had tricked her though, she shoves him into the pond and her plants immediately turn on him, trying to drown him.

[[folder:Live Action Television]]
* In ''Series/{{Bewitched}}'' : Tabitha's powers are shown to develop in tandem with her wishes and feelings.
* ''Series/BuffyTheVampireSlayer'':
** Willow is a partial example. Though her magic isn't explicitly stated as being emotional, an arc in season 6 has her going out of control after her lover Tara is killed. Willow is also offered a job as a Vengeance Demon in season 4 because her despair impresses D'Hoffryn.
** After he leaves for a while, [[spoiler:Oz]] reappears and he can't stay in control/human when he's emotionally unstable.
* In ''Series/OnceUponATime'', magic works from emotion, and characters channel their emotions in order to use their abilities. Most evil characters use their abilities by thinking about something bad that happened in their life and bringing that anger forward.
* ''Series/{{Charmed}}'':
** The Charmed Ones all have powers that are linked to their emotions. Prue accidentally pushes everything off the shelves in a supermarket when she gets angry with Phoebe in the pilot. Piper first freezes something when she panics because she has run out of time while being tested in an interview to be a chef.
** It is later elaborated that ''all'' powers are emotion-based, hence why [[spoiler:Prue can enter SuperMode when she is [[CursedWithAwesome cursed with Empathy]], or why Phoebe can turn a demon's energy attack back on him when she receives Empathy as an active power]].
* Crash [=McLarson=] from ''Series/TheAquabatsSuperShow'' can sometimes [[SizeShifter grow huge]] when his emotions are riled up.
* Common in ''Series/{{Misfits}}''. Curtis can only turn back time when he feels regret, and Simon at first can only turn invisible when he feels ignored.
* A large percentage of the Troubles on ''Series/{{Haven}}'' are activated by strong emotional situations, and usually the only ways to end the Trouble is to resolve the Troubled person's emotional problem, or kill them.

[[folder:Video Games]]
* ''VideoGame/KingdomHeartsBirthBySleep'': The Unversed are literally embodiments of Vanitas's emotions.
* ''VideoGame/SuperPrincessPeach'' plays with this by giving the usually helpless Princess Peach four powers based upon her temperament.
* VideoGame/AsurasWrath gives the seven guardian generals their supernatural powers as a result of "mantra affinities" based on different emotion (in this case pertaining to the {{Seven Deadly Sins}} ). The stronger the emotion, the more powerful they become. [[UnstoppableRage One can guess from the title alone what the main character's mantra affinity is]].

* In ''Webcomic/{{UC}}'', Kelsi’s doesn’t seem to have any conscious control over her shorting out electronics power. Instead it activates every time she is surprised or embarrassed. Like when her fellow cast member [[http://www.wanderingchaos.com/uc/092906.html thinks]] she’s dating her friend Nicodemus.

[[folder:Web Original]]
* A rarely used power of Trayen from ''Literature/{{Phaeton}}'' is to convert his emotion into energy and release it. Which is bad news for anyone when he gets mad, and it seems that it's taking less anger to make bigger blasts.
* In ''Literature/{{Worm}}'', most parahumans' powers are more potent when they are in a similar emotional state to when they had their [[TraumaticSuperpowerAwakening trigger event]].
* ''WebAnimation/HanazukiFullOfTreasures'': The GreenThumb abilities of Moonflowers need an emotional trigger to work, the emotion influences the form the new Tree takes.

[[folder:Western Animation]]
* ''WesternAnimation/AvatarTheLastAirbender'' has a thing about Benders' emotions affecting their bending, and specific states of mind were required for each element. For instance, Zuko firebends by tapping into his anger. Later he discovers that his firebending is stronger when inspired by positive emotions, like a given love and passion for it. Conversely, Iroh states that a firebender can only bend lightning if they are sufficiently in control of their emotions and able to separate them. .
** A large concern in the earlier seasons is Aang's temper. His Avatar State, which turns him into a PersonOfMassDestruction, is awakened by extreme distress or immediate danger. A large focus of his character development involves learning to accept and later control the Avatar State.
** In the SequelSeries ''WesternAnimation/TheLegendOfKorra'', light and darkness are closely connected emotions. As [[spoiler:Iroh]] put it, "In the SpiritWorld your emotions become your reality." Unalaq was capable of turning spirits dark by projecting his own anger and negative emotions, while Korra eventually learned to purify spirits by using her own inner peace and balance.
* An episode of ''WesternAnimation/TeenTitans'' had Raven and Starfire [[FreakyFridayFlip switch bodies]], and each had to learn to use the other's powers. This was very difficult for them both, because Starfire's power depended on releasing her emotions and Raven's power depended on her keeping her emotions firmly under control.
* When villains throughout ''WesternAnimation/WinxClub'' do something that pushes Bloom to far, she becomes so angry that her whole body literally becomes enveloped within a mass of flames, letting them know that they're [[OhCrap completely and totally screwed]] because she's about to unleash the full force of the Dragon Flame power on them.
* The villain named Father from ''WesternAnimation/CodenameKidsNextDoor'' can coat himself with and manipulate fire, but he flares up accordingly as he gets angrier.
* An episode of ''WesternAnimation/SamuraiJack'' involves a big, clumsy, simple-minded, oafish creature following Jack around and causing Jack all kinds of trouble by accident / ignorance. Eventually Jack becomes fed up and yells at the creature to go away. Obviously heart-broken, the creature leaves and starts crying by itself. Then Jack is ambushed by some of the deadliest robotic villains he's ever faced. Normally, robots = acceptable targets for slicing and dicing, but Jack is actually defeated! [[spoiler:The oafish creature witnesses this and suddenly transforms into a terrifying berserk monster who shows no mercy and easily destroys the robots with little effort, even though one tries to flee. Once the robots are destroyed, the creature calms down from it's berserk state and turns back into it's prior innocent self.]] Jack wakes up and figures out what happened, even though the creature doesn't seem to remember. Jack lets the creature know he forgives it, and while the creature doesn't seem to understand why it's happy that Jack is it's friend again.
* Most of ''WesternAnimation/StevenUniverse'''s Gem powers first activate when he's in a heightened emotional state, fitting his status as TheEmpath and an AllLovingHero (traits he inherited from [[MissingMom his mother]]). He initially suffers from some PowerIncontinence as a result, but he gets the hang of it over time.
* In ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', strong emotions can actually increase the power of spells being casted, which can account for some of the StrongAsTheyNeedToBe moments the cast (particularly Twilight) have. [[DarkMagicalGirl Starlight Glimmer]], the BigBad of Season 5, pretty much admits that part of the reason her magical abilities are so strong is that she channels her emotions into them (and she had ''lots'' of [[ThePowerOfHate feelings of hate and revenge]] to tap into when she was a bad guy).
** "Top Bolt" implies that a pegasus pony's flight skill is at least partially tied to his or her confidence, which is borne out by other episodes - for example, [[ShrinkingViolet Fluttershy]] is a poor flier, while [[AwesomeEgo Rainbow]] [[LargeHam Dash]] is the fastest pegasus alive.

[[folder:Real Life]]
* A chameleon's color-changing ability is not tied to its surroundings, but rather a combination of temperature as well as its current mood. What color each emotion represents can vary depending on chameleon, but they generally darken their colors when frightened and turn brighter colors when excited.