I saw a lot of people talking about the manhua 'Story of Evil' online, and from what I've pieced together from discussions and wiki dives, it centers on a family deeply entangled with demonic forces. The main figure seems to be a guy named Jude, or maybe Juda? I think it's Jude Lizarb. He's the son of a human and a powerful demon lord, which sets up his whole conflicted identity. His sister, Rin, is often mentioned as a really key character too—she's got her own massive power and a fierce protectiveness over Jude. Then there's their father, the Demon King himself, who is this looming, terrifying presence whose schemes drive a lot of the plot. I also see the name 'Sephis' come up a lot as a major antagonist, another high-ranking demon with his own agenda. The characters around them, like their human mother and other demon nobles, seem to shift in importance depending on the arc.
Honestly, I tried reading a few chapters, and the character designs are stunning, but I found the translation I had access to was a bit all over the place, so some motivations were hard to follow. People who've read more say the core dynamic is really the push-and-pull between Jude's humanity and his demonic heritage, with Rin often acting as his moral anchor or, sometimes, his reckoning. The father-son conflict is apparently classic but done with a lot of visual flair.