The only scout of the Order of Favonius is a Pyro 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 Amber.
Agnidus Agate Sliver
Number required: 1
Agnidus Agate Fragment
Number required: 9
Agnidus Agate Chunk
Number required: 9
Agnidus Agate Gemstone
Number required: 6
Everflame Seed
Number required: 46
Small Lamp Grass
Number required: 168
Firm arrowhead
Number required: 18
Sharp arrowhead
Number required: 30
Weathered Arrowhead
Number required: 36
Amber Talents Upgrade Materials List
Firm arrowhead
Number required: 18
Sharp arrowhead
Number required: 66
Weathered Arrowhead
Number required: 93
Teachings of Freedom
Number required: 9
Guide to Freedom
Number required: 63
Philosophies of Freedom
Number required: 114
Dvalin's Sigh
Number required: 18
Crown of Insight
Number required: 3
If you're looking to upgrade your Alloy here is the complete list of the materials you'll have to farm to Ascend the character and her talents.
