The Deceiver

This is why you should always listen to the Brains.

The one who tricks others. They put forth a façade of friendliness, trustworthiness, or reliability for their victims to soften them up and render them easier to hoax. However, no matter what trickery Deceiver's employs, those like the Brains can be counted on to see through their acts. The Brains may make multiple attempts to warn the Deceiver's chumps, but their warning is almost always ignored until the last minute when the Deceiver shows their true colors. It only gets more insulting to the Brains if the fools argue with them on if the Deceiver is good or not and ultimately decide to shut the Brains out. If these idiots are especially idiotic, they'll continue to fall for the Deceiver's trick despite the red flags that they mean no good. Eventually, the Deceiver puts an end to their sham when the Truth Comes Out and launch their attack on their prey. It's at this point when their targets believe the Brains instead of listening to them from the beginning. It's completely acceptable for the Brains to mock the Deceiver's dupes at this point.

The reason why the Deceiver wants to lure their victims into a trap varies from character to character. Sometimes it's to feast on the dupe (like with some real-life animals), other times it's to rob them of their goods when they're most vulnerable to the big strike. Whatever their motive may be, they all have one thing in common: they can at least trick one person into thinking they're a good guy and take advantage of that tricked person so the Deceiver can get what it is they want.