Different (Peter Maximoff)

Two.

"Professor?" The buff man spoke pushing open a set of brown doors, on the other side, Forest noted, there was a man who sat in the middle of a room in a wheel chair surrounded by about eleven to maybe fifteen kids who appeared to be around Forest's age. The man glanced over at the other man who had some what rudely interrupted what Forest could only assume was a class. He peered at Amelia first, as he recognised her- and then he took a look at Forest "Okay that's all for today, class dismissed" he spoke, still looking at Forest only now he had his pointer and index finger pressed gently against his right temple. He gulped.
Once all the students had left, including the man who brought the two to the room- the bald headed blue eyes man offered them a seat. His chair moved and soon he was behind a desk, Amelia grabbed two chairs placing them both down. "What gives me the pleasure of welcoming you back here Amelia?" The man asked, although he already knew.
"My sister, she doesn't know how to control her mutation" she sighed, the professor knew what her mutation was- from the minute he looked at her, however he didn't understand yet to what extent her power could reach.