You'll need to visit the benches in a smithy to craft ammo! You can craft them at the little anvil in the smithy in Greeha or Auris village.
Edit: I noticed the normal type aren't currently craftable. I'll fix that in a hotfix later this evening!
Oh, cool! Thanks for explaining that!
One more thing to check on for the 1.0.4 release- patch notes say that Ariana can explode mid-conbat, but every time I've tested that, she's stayed in the fight and exploded immediately after combat ends.
Drats, thought I fixed it last patch. Thank you for letting me know!