The sister of the Church of Favonius is a Cryo 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 Rosaria.
Rosaria Ascension Materials

Shivada Jade Sliver
Number required: 1

Shivada Jade Fragments
Number required: 9

Shivada Jade Chunk
Number required: 9

Shivada Jade Gemstones
Number required: 6

Hoarfrost Core
Number required: 46

Valberry
Number required: 168

Recruit's Insignia
Number required: 18

Sergeant's Insignia
Number required: 30

Lieutenant's Insignia
Number required: 36
Rosaria Talents Upgrade Materials List

Recruit's Insignia
Number required: 18

Recruit's Insignia
Number required: 66

Lieutenant's Insignia
Number required: 93

Teachings of Ballad
Number required: 9

Guide to Ballad
Number required: 63

Philosophies of Ballad
Number required: 114

shadow of the warrior
Number required: 18

Crown of Insight
Number required: 3

If you're looking to upgrade your Yoimiya here is the complete list of the materials you'll have to farm to Ascend the character and her talents.