A (non-child) character who exhibits vulnerability also has a very high voice.
In fiction with sound, you might often get evidence that Evil Sounds Deep or that Power Makes Your Voice Deep. After all, a deep, imposing voice helps stir fear into your hearts. So what if, instead, the character sounds like he inhaled helium or never went through puberty? Well, high voices are associated with children, so chances are that your character is meant to evoke a protective instinct as if they were a child. The trope applies to characters who are portrayed as vulnerable in addition to having a significantly high voice. Vulnerable character types include all varieties of The Woobie, The Ingenue, the Damsel in Distress, and the Ineffectual Sympathetic Villain. Because of their excessive emotional and/or physical vulnerability, these characters will typically fulfill a peripheral role of some sort, such as that of a Sidekick or Love Interest. In works where such a character is the protagonist, it usually focuses more on virtue than on heroism. They can technically be evil, but will not be the Big Bad, and will be at worst an Ineffectual Sympathetic Villain or a Minion with an F in Evil. Though this is often more noticeable on a male character than a female character, there are female examples as well. This trope is generally not applicable to characters who shouldn’t have gone through puberty yet, as their voices will be high by default. Compare Tenor Boy for heroic characters being portrayed with high voices, though usually not as high as these. Contrast Badass Baritone, Power Makes Your Voice Deep, and Evil Sounds Deep. Supertrope of Screams Like a Little Girl.
ExamplesFilm – Animated