first must go merindora npc

İlk önce Grana'daki Merindora adlı NPC'ye gidin ve Ruh Özü görevini tamamlayın.

You get this item by exchanging with Moyamo in Kamasylvia (https://bdocodex.com/th/npc/50715/)

If you go to this NPC to convert pieces nothing will appear until you first go to merindora, collecct all the combine items, show her the items in your bag and then accept the quest for knowlege of ornettes spirit essence. So yes, it is correct, first you need to visit merindora, if you haven't already.