Oh, Hades absolutely shows up in the Percy Jackson series, and he’s way more interesting than the typical 'evil underworld god' trope. Rick Riordan really fleshes him out in 'The Lightning Thief' and later books, giving him this nuanced personality—sort of a grumpy, misunderstood uncle vibe. He’s not just some one-dimensional villain; he’s got his own grudges, especially against Zeus and Poseidon, which makes his interactions with Percy super tense. The way Riordan modernizes Greek mythology is brilliant—Hades wears a black leather duster and runs the Underworld like a bureaucratic nightmare, complete with soul queues and paperwork. It’s hilarious and dark at the same time.
What I love most is how Hades’ role evolves. In 'The Last Olympian,' you see him as this pragmatic ruler who’s more concerned with balance than outright destruction. His relationship with Nico di Angelo adds layers too—there’s this messed-up father-son dynamic that’s oddly touching. Riordan never lets the gods off the hook for their flaws, and Hades is a prime example: powerful, petty, but weirdly sympathetic. Also, his wife Persephone’s seasonal visits? Genius way to tie in the myth of her abduction without making it creepy for a middle-grade audience.