Sen morphed her left hand into its original form. She then activated a rune inscribed on the palm. Her scythe slowly emerged. Once the giant scythe was fully summoned Sen spun it a few times before putting it down and leaning on it (when I say the scythe is huge I mean huge, like 6'6). 
"I am the teacher, and I'm not five. This is not my true appearance, if you want to see that then just tell me," Sen told her, she did not like disrespectful students.