"At this point in the story"
We're not supposed to care about Jackie yet, not nearly as much as Star. That doesn't mean we can't like her, and it's actually great that even most people who are diehard Starco fans don't want to see her get totally screwed. It would have been easy to make Marco have a crush on a Britney and resolve that mess the standard way, but they've made something a lot more interesting and painful.
The bottom line is Jackie is a character in Star's story, and -for now- it seems like her role is going to be "that sweet girl of Marco's dreams who he's going to have to tragically leave behind to chase after his best friend."
If Jackie was just as "dimensional" and "compelling" to the audience as Star, if we cared about her as much or even more than Star, then it would be a lot harder for us to sympathize with Marco's tough decision.
As things stand, we like Jackie but we don't truly love and appreciate her like we do Star Butterfly.>>91501744>a character becoming a main character?
We have no idea what Jackie's role in the story going forward will be. We can guess by reading between the lines and looking at how the narrative is developing, but there's many directions they could take her even if her current role as "Marco's love interest" is threatened.
To me, the only "main characters" in this show are Star and Marco (maybe Ludo, but not in the same sense), and it should stay that way.
Even if Jackie gets repurposed as some supernatural ally and becomes a major recurring character, there's a wide range of development between other characters like Tom or Buff Frog.
I'd like it if Jackie could grow enough to carry an episode on her own, but she's not there yet and probably won't be anytime soon, and that's okay because she doesn't need to be.
Trying to tell a story where there isn't one to tell is how we get episodes like Fetch, and other shows like Adventure Time lose their focus over the seasons in the name of "lore."