Who rides shotgun on your trip to Macalania temple?

For most people it seems overwhelmingly Lulu.

This wiki page is an interesting read about all the changes that occur throughout the game.

https://finalfantasy.fandom.com/wiki...nal_Fantasy_X)

I imagine getting a high affection for Kimahri is kind of like dating Barret at the Gold Saucer. It can be done, but you might have to go out of your way to do it.