One might argue that Cheryl was always a villain on this show. One might also argue that she was never villain and simply misunderstood. However, I think we can all agree that Cheryl has never been darker than in the Season 1 Riverdale final when she burnt down her family's mansion. Cheryl has a very specific aesthetic on this show. Vaguely preppy, very sexy, and almost always garbed in red. At this moment however, in her modest white church dress, she looks part avenging angel and part angry spirit. This is, of course, entirely purposeful on the part of the show runners. In this moment, Cheryl isn't supposed to look like a bitchy high school girl. She's supposed to look like a monster. Even if said monster is entirely in the right with her anger.
Betty: I should've told you about Chuck, but I lied. And instead threw you this party you didn't want. Jughead: Why did you? Betty: Something is very...very wrong with me. Like, there's this darkness in me that's overwhelming. Sometimes I don't know where it comes from, but I think that's what makes me do things.
Veronica: What the hell is a "Sticky Maple"? Kevin: It's kinda what it sounds like. It's a Riverdale thing. Veronica: No, Kevin, it's a slut-shaming thing. And I'm neither a slut nor am I going to be shamed by someone named, excuse me, Chuck Clayton! Does he really think he can get away with this? Does he not know who I am?! I will cut the brakes on his supped-up phallic symbol.