History Main / InsanityImmunity

** Implied when Scarecrow's fear serum doesn't drive Batman insane, either because of his indomitable will... [[AlternativeCharacterInterpretation or because]] his own [[BecomingTheMask insanity]] is strong enough to withstand it.

-->-- '''Aldous Huxley''', ''Literature/BraveNewWorld Revisited''

* ''VideoGame/DawnOfWar'': Certain units are immune to morale damage, some by virtue of their indomitable faith, others by being RoboticUndead who ''cause'' fear by their mere presence... and then there's Khornate Berserkers and Possessed Marines, who are simply to batshit insane to feel fear (although they do have lines for morale daage).

*** Also, in DC and ''ComicBook/TheMask'' crossovers, both Joker and [[Characters/DCComicsLobo Lobo]] put on the titular mask, and it doesn't affect their personalities much at all -- [[SubvertedTrope at first, anyway]]. Eventually, Joker becomes much more destructive, and when Batman points out that this isn't funny (by Joker's standards, anyway), Joker realizes that Batman's right and promptly takes the mask off, showing that the mask actually does [[LossOfInhibitions unlock inhibitions]] -- it was making him pull stunts and commit crimes that he normally wouldn't think were "funny".

** Gilgamesh from ''VisualNovel/FateStayNight'' is immune to being corrupted by [[spoiler: the corrupted Holy Grail]] because his [[AwesomeEgo ego]] is too strong. He still helps out the villains because their goals happen to align.

When a character is already so crazy that none of the traditional GoMadFromTheRevelation-type phenomena or BrownNote will affect them in the slightest; they can speed read ''Literature/TheKingInYellow'' and the TomeOfEldritchLore, get into a StaringContest with Cthulhu, contemplate the Void without any negative mental effects, and get [[ThroughTheEyesOfMadness caught in the Throat of Madness]], simply because they can't get any crazier. This can also mean that they can wield/absorb any powers with these effects without any problems, either; powers that would drive a normal man insane simply won't affect them in any negative fashion.

[[quoteright:250:[[ComicBook/BatmanJudgeDredd https://static.tvtropes.org/pmwiki/pub/images/im6fsqp.png]]]]
[[caption-width-right:250:[[WaxingLyrical Guess I'll have to break the news]]\\

* Completely inverted in ''WesternAnimation/BatmanTheBraveAndTheBold'' when Joker gains the powers of [[RealityWarper Bat-Mite]]. After torturing Batman the entire episode, Batman tricks him into trying to drive Batman insane by entering his mind. Turns out [[spoiler:Batman is so sane even the reality warping powers Joker now has are completely useless in there, and Batman ultimately uses it to show Joker his worst nightmare: a world where Batman doesn't exist and, consequently, the Joker is a no-name average joe... and a perfectly sane one at that.]]

* The Thriller Bark arc in ''Manga/OnePiece'' features Perona, who can manipulate the Negative Ghosts, which have the ability to break the will and spirit of anyone they phase through. Luffy, Zoro, Sanji, and Franky were victims of this, becoming so stricken with grief and despair to the point they just want to lie there and die. However, Usopp was completely immune to the effects since he's naturally a negative person. When Perona tried to overdose him with ghosts, the ''ghosts'' were the ones who fell into despair.

* While few of U. N. Owen's guests in Creator/AgathaChristie's ''Literature/AndThenThereWereNone'' are particularly well in the head, the first to die is TheSociopath Anthony Marston, who genuinely can't comprehend either his own culpability in recklessly running over two children with his car, or his companions' disapproval when he describes the incident as "beastly bad luck" for ''him'' because he had his license suspended. Owen, who invited the TenLittleMurderVictims specifically to [[SerialKillerKiller punish them for their own role in other people's deaths]], chooses to kill Marston first ''because'' he's too sociopathic to torment with either guilt (given his LackOfEmpathy) or fear (given his reckless disregard for consequences). Overlaps with TooDumbToFool, or at least Too Dumb to Torment--particularly in contrast with Philip Lombard, a similarly amoral guest who also freely admits his own crime. Whereas the savvy Lombard at least grasps why others would object to his actions (even if he himself doesn't care) and has enough self-preservation instinct to be terrorized, the dim Marston's only use to Owen is [[MakeAnExampleOfThem as an example to the others]].

* While few of U. N. Owen's guests in Creator/AgathaChristie's ''Literature/AndThenThereWereNone'' are particularly well in the head, the first to die is TheSociopath Anthony Marston, who genuinely comprehends neither his own culpability in recklessly running over two children with his car, nor his companions' disapproval when he describes the incident as "beastly bad luck" for ''him'' because he had his license suspended. Owen, who invited the TenLittleMurderVictims specifically to [[SerialKillerKiller punish them for their own role in other people's deaths]], chooses to kill Marston first ''because'' he's too sociopathic to torment with either guilt (given his LackOfEmpathy) or fear (given his reckless disregard for consequences). Overlaps with TooDumbToFool, or at least Too Dumb to Torment--particularly in contrast with Philip Lombard, a similarly amoral guest who also freely admits his own crime. Whereas the savvy Lombard at least grasps why others would object to his actions (even if he himself doesn't care) and has enough self-preservation instinct to be terrorized, the dim Marston's only use to Owen is [[MakeAnExampleOfThem as an example to the others]].

* In the ''WesternAnimation/AdventureTime'' episode "Empress Eyes", Ice King is apparently under the control of a female vampire. However, after he adamantly refuses to kill [[LikeADaughterToMe Marceline]], it is revealed that he was only following her orders because [[FavorsForTheSexy she was a beautiful woman he thought was interested in him]].

** Whether or not ComicBook/ThePunisher is insane is heavily debated both in-universe and by the fandom, but his single-minded determination to exterminate all criminals means there isn't really anything that can distract him from that. Once, when two female super-villains who had the ability to control minds tried to take over Frank's, he gave it a complete no-sell, telling them that it didn't feel different from any other day. The really frightening thing about that is not only couldn't they control his mind, but ''he didn't even notice their efforts to do so.'' He also fits into the above category of being unaffected by the Penance Stare.