The Sacred Blacksmith: Aria

Aria is a demon sword with the power of wind who states she is older than about 40 years. She has been used cruelly in previous wars thus is fascinated by Cecily as Cecily is a knight who doesn't like to kill. Aria and Cecily form a strong friendship. 

The Sacred Blacksmith: Cecily Cambell

She is a knight from The Knight Guards of the Third Independent Trade City. Since the Devil War, the head of the Cambell family has fought as a knight. Her grandfather and father founded, protected and supported independent cities. When her father dies from an illness, she decides to be knight - even though she's a girl and doesn't know how fight with swords too well. In her first fight she broke her sword, and almost got killed, if Luke didn't save her then. Disappointed that it was 1 episode though.