Nagisa is quite calm and composed, but like everyone else, she has her limit, and she can get quite ruthless once someone breaks her composure. She also tends to overthink things which can sometimes end up causing trouble for other people. She is one of the three student council presidents of Trinity, representing Filius, one of the student union bodies that make up Trinity, and the host of the "Tea Party" student council. Nagisa is refined and soft-spoken, but hardly reveals her true feelings.