Writing a Vox x OC fanfiction is such a fun way to dive into the Hazbin Hotel universe! First, I'd suggest really getting to know Vox's character—his charisma, his tech-savvy ruthlessness, and that slick media mogul vibe. My OC usually starts as a sketch of traits that contrast or complement him, like a rebellious hacker or a reluctant ally from his past. The key is balancing their dynamic; Vox isn't the type to fall for just anyone, so your OC needs depth—maybe they challenge his authority or see through his manipulative charm.
For the plot, I love weaving in Hazbin's chaotic energy. Maybe your OC gets dragged into a ratings war between Vox and Alastor, or they uncover a secret that threatens his empire. Dialogue is where Vox shines, so pepper in his smug one-liners and let your OC hold their own. And don’t shy away from the darker, morally grey edges of their relationship—it’s Hell, after all! I always end up rereading scenes aloud to check if their banter crackles enough.