Based off of personalities and not circumstances of the game or before the game. You can keep existing couples if you want and include secondary characters.
Auron and Belgemine. I think they'd have a very nice, professional relationship. They'd both focus on their task of training and preparing Yuna, with little more than a nod to each other in passing, with a "see you when you get home". A mature married couple, rather than young infatuation.
My friend Delzethin is currently running a GoFundMe account to pay for some extended medical troubles he's had. He's had chronic issues and lifetime troubles that have really crippled his career opportunities, and he's trying to get enough funding to get back to a stable medical situation. If you like his content, please support his GoFundMe, or even just contribute to his Patreon.
He can really use a hand with this, and any support you can offer is appreciated.
Auron and Lulu.
Wakka and his Blitzball with a similar relationship that Tom Hanks and the Wilson Volleyball had.
I tend to find that two extremely sensible, serious people end up making for a dull relationship (that's coming from one of those sensible, serious types in a relationship) so I think the relationships that would really work are clearly Lulu and Wakka (who knew?) and Auron and... wait... uh... Rikku? Maybe not.
Bow before the mighty Javoo!
Hmm I don't think Auron and Lulu would last too long before Auron was searching for a bitchbreak node on his sphere grid.
Staring at my sig will not induce epileptic fits.
A themagicroundabout sig, by themagicroundabout.
Shauna and my relationship work because I'm a wild card and she's a down to earth stony face bum. Auron is a down to earth stony face bum, but Rikku is eccentric rather than wild. I don't think that would last.
Brother and Lulu, now there is a dyn-o-mite combo.