So, this is a bit of a weird case because 'Zoophobia' itself is this animated series by Vivienne Medrano (VivziePop), and 'Bad Luck Jack' is a comic spin-off set in the same world. The protagonist in that specific comic is, well, Jack. Full name's Jack M. Nolan. He's this skinny, nervy guy with awful luck who ends up becoming a 'familiar'—basically a human servant—to this incredibly powerful demon named Damian after a botched ritual.
It's classic fish-out-of-water stuff, but the core is really Jack trying to survive and maybe find some semblance of normalcy in a universe packed with supernatural creatures who mostly see him as a snack or a punchline. His 'bad luck' is almost a character itself, constantly throwing him into absurdly dangerous situations. What I like is that he's not some chosen one; he's just a dude with terrible survival instincts trying to navigate a world he never asked to be part of. The dynamic with the arrogant, flamboyant Damian drives most of the conflict and humor.