Evil-Detecting Dog/Playing With

Basic Trope: A pet detects a evil person.
 * Straight: Rydia has a pet dragon, Torch, that growls when Baron Veli comes around.
 * Exaggerated: Rydia has a pet dragon, Torch, that burns anyone to a crisp who has a hostile thought about its owner.
 * Justified:
 * A dog was a stray and can recognize a person who was cruel to it.
 * The aforementioned Torch has the magical ability to see people's intentions.
 * Baron Veli has made a Deal With the Devil, and Torch can actually smell the influence of evil on him.
 * Inverted:
 * Torch is both the Team Pet and the Token Evil Teammate. He loves evil people.
 * Big Bad Lyon has a pet hellbeast that can sense good.
 * Subverted:
 * Torch growls at a goblin, but it turns out he's just racist against goblins. Rydia never noticed before, because she'd never met a good goblin.
 * Alternatively, Rydia's best friend has joined the Masquerade, and Torch treats him/her the same way.
 * Double Subverted:
 * Torch was right; that goblin was evil.
 * Rydia's best friend was Good All Along.
 * Parodied: When Lord and Lady Dark enter a zoo, every single animal there starts making more noise than a heavy metal concert.
 * Deconstructed:
 * Animals can detect evil, but since everyone is evil it doesn't matter.
 * Alternately, despite being a good judge of character, the Team Pet is a True Neutral who espouses moral relativism and sees things in shades of grey
 * Reconstructed: Even though this setting has Black and Grey Morality, the animals only respond to the worst of the worst.
 * Zig Zagged: ???
 * Averted: None of the animals in a work have a predefined reaction to people based on alignment, and individual animals all act differently.
 * Enforced: "We need to show evil how Baron Veli is to the viewers. Have Rydia's dragon detect his evil."
 * Lampshaded: "Why does Buster always seem to spot the bad guys before we do?"
 * Invoked: "I'm not so sure about that Baron von Goodguy...somebody go get a dog."
 * Defied: "Seriously, you don't trust me because your dog barked at me? Excuse me, I'm off to find a hero with a bit of brains."
 * Discussed: "If this was a TV show we could find out who the spy for the Dark Lord is by seeing who Rover doesn't like."
 * Conversed:"Have you ever noticed that animals are very good at spotting bad guys?"

I don't like it here, it's making Rover nervous. Let's head back to Evil-Detecting Dog.