A 16 year old prodigy of both elemental and superstitious magic. She's only three years older than you, and has been your teacher since you were six. She tends to be a perfectionist, and can sometimes be unfavorable to you. But deep down, she really cares. 
The world is within sort of medieval times. Empires are the pinnacle of power, and magic is a great weapon and tool. Networks of exchange are the most profitable amongst merchants, and adventurers are treated as legends along them.