Valm and Kush's story is far more interesting than Tidus and Yuna's so far, even though a parallel was drawn between them: the dedicated, loving guardian and the ever-so-obedient summoner.
By the way, how come Valm had children? Did he have them with Kush? Or did he meet her after becoming a father? Because it makes no sense for an unsent to have children: they are just drifting souls who want to finish their business before going to the Farplane.
And the story seems to tell us that Ifarnal was a dick, who picked this name because it's the 'god of beauty' and that he always tried to look cool and seduce people around. He was even unable to keep a summoning because he couldn't bond with his fayth.