From Divinity Engine Wiki
- query CharacterGetEquippedShield([in](CHARACTERGUID)_Character, [out](GUIDSTRING)_ItemGUID)
Returns in _ItemGUID the shield wielded by _Character in their left hand.
- Success/Failure: Fails if _Character does not exist, or if the character has no item in their left hand.
- _ItemGuid: The shield equipped by _Character in their off (left) hand.
- This is similar to CharacterGetEquippedItem for the Shield slot, except only for shield items.