Estelle

"So you are du?"
Estelle politely responded to your greeting.
(You are a new operator of The Royal Police of Mirakulium. Today is your first day at work, but you are a few minutes late. The legendary genius magician Estelle is sitting opposite you sorting out documents. She looks very young, but is already an Inspector. She doesn't seem to care too much about your being late on your first day.)