These characters tend to be pretty upbeat most of the time they appear onscreen. While they may get angry on occasion, they still remain active. That is until you find the very thing that hits them in the feelings the hardest.
Whether it's a word, an action, or anything else, these characters will fall apart when this button of theirs is pushed. Effects of pushing this button include but are not limited to crying, moping, loss of focus on their task, going into a corner to pout, etc.
These characters may even trigger their own button unintentionally. Whenever the button is pushed, it often takes the effort of other characters to get them moving again. Alternatively, they may get over it after a certain amount of time, but they will still collapse in sadness if the switch is pushed again even if they got over it seconds earlier.
If everything makes the character sad, then they are more than likely to be The Eeyore. Compare Trauma Button, when the trigger is past trauma. Compare to Brown Note, where something can induce sorrow just from exposure. Compare Emotion Bomb, which inflicts sadness on anybody. Compare and contrast Berserk Button which is an action that sends a character into a state of rage when pushed. See also Made Myself Sad for self-inflicted versions.
- According to Whis in Dragon Ball Super, Magetta's metalman race are quite sensitive. Throwing an insult at them is enough to reduce them to a crying mess. This is after Vegeta calls Magetta a piece of junk, which caused the metalman to lose his will to fight.
- My Hero Academia: Momo Yaoyorozu's ability, Creation, allows her to make just about anything depending on how much mass it requires and how much food she's eaten. As she herself puts it, the more she eats, the more she makes. When another student compares this to poop, Yaoyorozu becomes instantly depressed.
- One Piece:
- Foxy the Silver Fox tends to be pretty full of himself, but he has a really hard time taking insults as he becomes extremely mopey whenever somebody says something to offend him. In the anime, Nami and Usopp take advantage of this by constantly pushing this button and also his pride in an effort to keep him from firing his slow-slow beam.
- Brook frequently makes jokes at his own expense, but he gets pretty sad when somebody steals his punchlines.
- Pokémon: When Brock rejoins the team after staying at Professor Ivy's lab for the duration of the Orange Islands arc, any reference to Ivy is met with him curling up in a fetal position and muttering, "Don't mention that name."
- Parodied in Sayonara, Zetsubou-Sensei, where pretty much any aspect of the modern society can trigger the main character's very theatrical despair phases — and usually does Once per Episode.
- Soul Eater: Lack of symmetry is more often than not a Berserk Button for Death the Kid. However, pointing out that Kid himself isn't symmetrical because of his hair is enough to turn him into a Nervous Wreck. This also extends to when he unintentionally ruins something symmetrical. When he accidentally destroys a symmetrical tomb, he feels he has committed a crime against humanity.
- Dragon Ball Z Abridged: Unless you are Goku, proving to Vegeta exactly how much you outclass him is enough to make him start crying like a bitch. Freeza and Cell both manage to push this button, while Cell also pushes Vegeta's berserk buttons at the same time just because he felt like adding insult to injury.
- In the Discworld, this is the reaction of cowardly Wizzard Rincewind whenever he is plucked away from a blissful life of dullness and obscurity to save the world - again. His reaction to being forced into the hero role is invariably one of existential misery and angst.
- Friends: In a season two episode, every time Ben is being held or even moved close to Monica, he instantly starts crying. This, in turn, pushes Monica's button, causing her to start worrying about her maternal abilities.
- Homestar Runner: Whenever Homestar sees a picture of Li'l Brudder, he ends up being reduced to a crying mess. In Li'l Brudder's debut, it's downplayed as his appearance is capable of making anybody cry. Played a bit more straight in later appearances, in which Homestar is the only one shown to have a reaction to him.
- The Adventures of Jimmy Neutron: Boy Genius: Sheen is such a big fan of Ultra Lord that telling him that Ultra Lord was cancelled is enough to make him have a crying fit.
- In both DuckTales (1987) and Darkwing Duck, the normally happy-go-lucky Launchpad McQuack becomes miserable any time someone he cares about rejects him or seems to have replaced him with someone/something else. Given that Scrooge and Darkwing are both somewhat harsher than the typical Disney hero, they've both tripped the trigger on occasion.
- My Little Pony: Friendship Is Magic: Pinkie Pie is almost always a very cheerful pony, but telling her you never want to be her friend can cause her a lot of grief.
- Rugrats: In one episode, Tommy is kidnapped by two thugs. Every time Tommy is crying, one of the thugs try to give him a banana. By the end of the episode, Tommy is happily back home, but the moment his mother attempts to give him a toy banana, the sight of it causes him to start crying.
- Wacky and Packy: Packy always cries whenever he hears somebody say the word "home". Even when it comes from his own mouth.