Asquall

Hi, new player here. As a fan of other card games, I wonder where my card is stored. I mean, on other card games, you have card inventories. You can swap cards from your deck and inventory immediately. However, the vault on Pathfinder seems do not allow card swapping. For example, in recent play I just realized that my Rogue didn't have proficiency for ranged weapon (got a Returning Throwing Axe +1, so I thought it was cool), so I wanted to remove it and change to Dagger or Dart. Where can I do this? And the screen after we finished scenario, what happened if we remove the cards newly acquired from the scenario from the deck? Intuitively I thought they went to some sort of inventory (Vault?), which I can later use, but this seems not the case?