Aerin first detaches the crystal and tries to attach it to the hilt of her sword, then drinks two of the Cure Light Wounds potions and one Cure Moderate Wounds potion, looks at the dragonkin's potions, and takes the dragonkin's gold and rope. She won't interact with the guards independently until she's finished doing all those things, though if they speak to her before she's done she'll respond.

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Healing: (1d8+1)[8] (1d8+1)[5] (2d8+3)[11] (plus one for each level any of the potions' creators were above minimum)
Knowledge Local: (1d20+3)[9]