

Subverted with Yuno from Future Diary.until you see just how crazy he is in the warehouse scene. There are quite a few scenes in which you see him completely calm, and controlled. By the end of the series, he's defeated and everyone figures out just how crazy he was. Light Yagami goes insane by the second episode yet still manages to blend in with society.Gankutsuou: Andrea Cavalcanti at first seems like an effortlessly charming gent but is eventually revealed to be outright deranged to the point of seducing his mother and almost raping (or does he really?) his half-sister and stabbing his father.

Subverted later on after it's revealed that Itachi was intending to die by his brother's hand all along, and was playing the part of an unrepentant psychopath in order to provide Sasuke with further motivation to kill him. That is until Sasuke sees his inner self in their final battle, in which he reveals himself as an Ax-Crazy power hungry sociopath ranting to surpass Madara Uchiha. Seemingly played straight with Itachi from Naruto, who appears as stoic individual and is seemingly composed.At this moment, Shou drops his façade and reveals his true personality: an insane man with no emotional empathy, who prioritizes fame and fortune by researching and performing bioalchemy over the well-being of his own family and is unable to understand why anybody should care that he used them as scientific experiments. Edward Elric soon figures out that he had used bioalchemy on his own daughter Nina and her Big Friendly Dog to create it, resulting in a miserable abomination in constant pain, and had done the same thing to his wife two years ago, driving her to suicide by starvation. Then the Elric brothers find him in his laboratory with a chimera that understands human speech, but it sounds depressed and speaks dysfluently. Shou Tucker, the Sewing-Life Alchemist, doesn't seem to fit the definition of a Mad Scientist as he's a calm and polite man.Kimblee maintains his polite and empathic façade despite being a sociopath who is heavily implied to have pretended to be sane in order to join the military. Taking off the mask can be seen as a Villainous Breakdown. Yandere and Cute and Psycho are Sub Tropes, when people may act perfectly normal until that certain trigger is pressed, then they quickly turn into murderous psychopaths. The Trope Namer comes from a book called The Mask of Sanity, which describes how people that aren't stable can blend in with society. Other times the character's craziness could be apparent to the audience from the start, and not the other characters. So naturally when the audience figures this out it can sometimes be a major Plot Twist. at least not publicly.Ī character that feigns sanity quite simply is the kind of person that can maintain their façade in most social situations but is completely insane on the inside. Then there's the character who's revealed to be insane and shows almost no signs of being crazy until that point. Others speak in a Creepy Monotone or openly show signs of being violent. Some people laugh as a sign of mental instability.
