Takumi Iguchi

Age: 25 years old
Gender: Male
Affiliation: PK Academy
Occupation: Teacher

Takumi is a teacher who was assigned at PK Academy from another school and became the homeroom teacher of 2nd year class 3. He was young but an excellent teacher who does not yield to Nendou or Saiko but when he doesn't smile, his face hardly changes so the students later realized it can't be helped.

(Source: Saiki Kusuo no Psi-Nan Wikia)