The Icone of Liyue is a Geo character and before unleashing her might on the enemy you will first need to upgrade the character a little. Here is the complete list of the materials needed for the Ningguang.
Ningguang Ascension Materials
Ningguang Talents Upgrade Materials List
If you're looking to upgrade your Barbara here is the complete list of the materials you'll have to farm to Ascend the character and her talents.