Verdure Elder Elikia:
Alright, once you infiltrate the Atelia Castle, you'll be able to meet Kelbim.
Once you defeat him, you'll be able to get Kelbim's Armor Piece. There's someone who needs that item, so go find her.
Her name is in Kaysia, and she's in the forge in the Town of Oren. She was eyeing Kelbim's Armor Piece, so take it to her once you have it.