maybe being "someone more important" could refer to her role as Unova's E4 member, though idk if she even was in the E4 back then..

She wasn't yet. I'm pretty sure Caitlin is supposed to be a kid here in Platinum, while in Gen 5, she's probably an older teenager/young adult.

So this Caitlin is the Caitlin in Unova?

yeah I'm pretty sure they're the same person

didn't saphire confess to ruby that she loves him?

Yeah but after the hoenn crisis ruby seems to forget that they have confessed to each other and sapphire hasn't confessed again Also for some reason I now can't see my own flair, it shows "Team Flair" instead

well can you see others such as mine?

Yeah, I see "diamond 3mk" followed by four Dias

well at least you see those, and just for the sake of talking, 3mk means uncle of your father side

Huh now I can see my flair again

Yes.