Charva wants to know what the creatures' weakest save is, sure.
Then she makes an approach to stay near the rest of the group should friendly helpful spells be needed and fires at the pink Guardian
Skipshot pistol vs KAC: 1d20 + 9 ⇒ (4) + 9 = 13
Piercing: 2d4 + 3 ⇒ (1, 4) + 3 = 8