The Traveler is a special character who can change the attribute and here is the complete list of the materials needed for the Anemo Traveler.
Anemo Traveler Ascension Materials
Brilliant Diamond Sliver
Number required: 1
Brilliant Diamond Fragment
Number required: 9
Brilliant Diamond Chunk
Number required: 9
Brilliant Diamond Gemstone
Number required: 6
Windwheel Aster
Number required: 168
Damaged Mask
Number required: 18
Stained Mask
Number required: 30
Ominous Mask
Number required: 36
Anemo Traveler Talents Upgrade Materials List
Divining Scroll
Number required: 6
Sealed Scroll
Number required: 22
Forbidden Curse Scroll
Number required: 31
Teaching of Freedom
Number required: 3
Guide to Resistance
Number required: 11
Guide to Freedom
Number required: 6
guide to Ballad
Number required: 4
Philosophy of Resistance
Number required: 12
Philosophy of Freedom
Number required: 6
philosophy of Ballad
Number required 20
Dvalin's Sigh
Number required: 6
Crown of Insight
Number required: 1
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.