There's a few Ai x Sana pictures out there on Pixiv. The ship even has it's own dedicated tag: アイ(マギアレコード) unlike Felicia x Tsuruno which I also ship.
Anyway continuing the discussion from the Iroha x Yachiyo image we've already discussed Iroha/Yachiyo, Iroha/Sana, Mifuyu/Yachiyo, and Rika/Ren however there's a few other ships I'd like to talk about.
Masara/Kokoro: I really like how when Masara met Kokoro she changed from someone who didn't care much for her safety and survival to someone who had according to her feelings she didn't understand (probably love) although I've only barely scratched Kokoro's side story.
Iroha/Touka: I like it how in the past Touka called Iroha "onee-sama" compared with Nemu's nee-san. That and from what I've heard from chapter 10 spoilers is that all of this was for Iroha's sake
Touka/Ui/Nemu: Besides the above mentioned ship this is the only one I could see either Touka or Nemu being involved in (unless you think Mifuyu wants a harem, just like Yachiyo does). All three of them have a good (romantic) dynamic between them. That and basically it seems that both Nemu and Touka only changed for the worse after Ui "disappeared". Had Ui have been there all along Touka and Nemu (and thus the whole game's plot) would have probably been vastly different.