Kat (Lyric Ross) doesn’t just have theoretical demons—hers have names. After her parents died in a car accident that she blames on herself, Kat became hardened to the world around her, ending up at a boarding school run by a mysterious nun named Helley (Angela Bassett) and bitter about every possible interaction with the kids around her. Father Bests (James Hong) runs the place supportively enough, but he’s getting pressured by an evil business entity in the area that’s trying to buy up as much real estate as possible to build a prison. Kat greets life with green hair, a snarl, and a fist, and the only other kid who seems to have any idea how to communicate with her is Raul (Sam Zelaya), himself an outcast from the cool kids group.
Meanwhile, demons Wendell (Key) and Wild (Peele) toil in the underworld, literally working on the massive frame of their Satan wannabe father Buffalo Belzer (Ving Rhames)—they literally live in his nose. While Belzer torments lost souls in a theme park of the damned, Wendell & Wild plant hairs with a device that drills holes and squirts hair cream. Wild likes to eat the hair cream, which gives him a funny feeling in his tummy and makes him a little high. But everything changes when Wendell & Wild discover that the cream can also bring things back to life. When Kat is chosen as a “Hellmaiden,” Wendell & Wild become her demons, and they have a plan to trade their newfound magic cream for something Kat can’t turn down.
Of course, the manifestation of grief or trauma into physical form isn’t a new thing in animation but Selick and Peele’s approach feels different in that it never traffics in pity. Kat isn’t a fragile creature overcome by her demons—she’s a Hellmaiden, dammit. Ross is excellent, never leaning into the cliché of the rebel girl and embodying the conflicting emotions of a confident young woman who happens to really miss her mom and dad. On other side, Key and Peele are expectedly fantastic, reportedly spending a lot of time riffing off each other in the studio, and then the animators worked with their raw, improvised material. They nail that classic animated archetype of characters just dumb enough to do something dangerous.