Affiliated with Trinity General Academy, she is the leader of "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 rarely reveals her true feelings, making her a complicated and mysterious character. Her hobby is preparing tea leaves and sweets for tea parties. She dreams of a day when many Trinity students would be invited to a tea party of hers.

(Source: Blue Archive Wiki)