SCARY SMILE FULL
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He ended up looking a lot like an alligator. Bleach: Kensei in the Turn Back the Pendulum Arc, when trying to comfort a young Shuuhei Hisagi.It takes a 'session' with her Cute Shotaro Boy brother to cheer her up where despite a subtle, pleasant smile that comes naturally, her forced smile results in this trope and her brother advises her to stick to being stoic. Sub-Audio stars a stoic Huge Schoolgirl that's mistaken for badass just because she doesn't/can't smile when the situation calls for it (girl talk, a guy offering tissues, etc.,) which really gets to her more than anyone realizes.This can be blamed on his maw of sharklike teeth. Every smile Christopher Shouldered from Baccano! gives is unnerving, regardless of the intent behind it.Otherwise, her Un-Smile is the kind of thing that lingers in your nightmares. When enjoying a bowl of her favourite ramen, Kayahara-sensei has a sparkly bishojo smile. Ramen Fighter Miki: Tomoka Kayahara somehow fulfills both this and When She Smiles.Oddly enough, she smiles in other episodes, though it's a rare sight.

Chihaya Kisaragi in The Idolmaster when the producer tells her to smile, though we don't see it.

(As for what it really looks like? Presumably nice.) When Akuru says she smiles now and then, The Un-Smile is what Akira imagines. She constantly looks mildly peeved, though she's not necessarily angry.

Lucky Star: Akira's friend Akuru Nakatani is never shown smiling.

In general Amu from Shugo Chara! is capable of smiling normally, but in her 'cool and spicy' mode at school when attempting to be friendly to others she has a threateningly disturbing smile.really.

But, given his normal disposition, his retainer, Jaken has a slowly-building panic attack over it, eventually begging Sesshomaru to 'go ahead and beat me, but please stop smiling!' More often, if Sesshoumaru starts to smile, it goes from a simple smirk to a Slasher Smile, then literally ear to ear in a horrifying way as part of his transformation to demon dog. And when he does it is a thing of beauty to the viewers. He's only shown (in current memory) fully smiling exactly once.

In Inuyasha, Sesshomaru's expressions normally run the gamut from happy (read: completely impassive) to furious (read: slight frown).

Naka Kaburagi from Nosatsu Junkie wants to be a model, but her smiling face makes her look like a criminal.

Her innately creepy laughter does not help matters.

Sawako's earlier attempts at smiling in Kimi ni Todoke turn out utterly horrifying.

SCARY SMILE PLUS

Hilarity Ensues when he tries to do it - plus follow a few other reasonable instructions completely literally - while asking a favour of the Minamis. Emphasis on 'forces himself' because his natural smile looks quite normal. Haikyuu!!: Whenever Kageyama forces himself to smile, like when he attempts to lighten up the mood during a volleyball match, his smile instead terrifies everyone.

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The effort as depicted in the anime series looks similarly painful.

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The first of the Full Metal Panic! Light Novels describes Sousuke's attempt at smiling for a student picture as making him look like he's suffering from facial neuralgia.

Scary smile