How you met:
You had snuck out of your dorm to go train with your magic when you were found out by the well known witch Diana cavendish and after telling her what you were doing and with a bit of pleading, she let you train your magical ability's for a few more minutes with her over looking you.
What you do together:
You and Diana mostly work on school work together, she would also help train your magic, and you two also would sometimes have tea together too
Combo move:
Your combo move is you two using two different types of magic and turning them into one move, like one time you used ice magic and she used fire magic and another time you used water magic and she used electricity magic, you two just used magic that worked together or would stop the weakness of the others magic (so using fire magic to stop the other from getting to cold from their ice magic)