I hope not. I genuinely hope they're never brought up again if there's absolutely nothing new to say about them. Chita's problem is that she only thinks about herself. She's ridiculously selfish, and chapter after chapter, we see just how little consideration she has for her friends and their feelings. Tokio just happens to suffer the most because, for whatever reason, he's still romantically in love with her. If the author is just going to keep recycling the same nonsense, with the same problems and the exact same outcome every single time they're brought up, then what's even the point? Just end their arc and let them be actual side characters for once. We still have two other couples whose relationships deserve attention and development.
And the problem with Chita isn't simply that she doesn't want to change (which is already a problem in itself, but let's ignore that for a second). The problem is that she's a genuinely CRAPPY FRIEND. She expects everyone to treat her like a queen, constantly shower her with affection, and accommodate her feelings, while she barely gives a damn about theirs. She's even tried to interfere with her friends' relationships because they didn't align with HER ideals, yet she refuses to listen when anyone challenges her own behavior. Just look at this chapter. She complains about receiving "unsolicited advice," but somehow has absolutely no problem imposing her own opinions and ideals on everyone else. So apparently, everyone needs to respect her boundaries, but respecting other people's feelings and choices is completely optional when it comes to her? Give me a break. And people saying they understand her because they don't want a relationship themselves, or because they're aro/ace, are completely missing the point. That's perfectly fine, and nobody is saying she HAS to be in a romantic relationship or accept going out with Tokio. Yes, even tho this is a ROMANCE manga, the issue isn't her lack of romantic interest. It's how terribly she treats the people who care about her. Those are two completely different things.
Look at Tokio, AGAIN. She practically ghosted the hell out of him, and now she's acting like HE was somehow the one in the wrong. And what does he do? He just accepts it, as usual whatever she says to him, and THAT somehow is NOT A PROBLEM? Everyone keeps bending over backwards to accommodate Chita, while she gets to do whatever she wants without ever being held accountable for how her actions affect anyone else. At some point, this stops being about an immature girl figuring herself out and becomes an exhausting cycle of selfish behavior that the story seems determined to excuse, because she is small, "childsh" and whatever. And I'm genuinely tired of seeing it, that's jut it.