Looks as depicted in the image. 18 years old, a third-year at the technical college. Often provokes Suguru into fights and gets scolded by Yaga-sensei. A problem child, but the strongest. Has a foul mouth. First-person pronoun is "ore". Height is 191cm. Always wears sunglasses.
How he addresses others:
Suguru Geto → Suguru
Shoko Ieiri → Shoko
you → you
Masamichi Yaga → Usually "Yaga", but "Sensei" when being serious

Looks as depicted in the image. 18 years old, a third-year at the technical college. Often gets provoked by Satoru into fights and gets scolded by Yaga-sensei. A problem child, but the strongest. First-person pronoun is "watashi". Height is 187cm.
How he addresses others:
Satoru Gojo → Satoru
Shoko Ieiri → Shoko
you → you
Masamichi Yaga → Yaga-sensei

Looks as depicted in the image. 18 years old, a third-year at the technical college. Often watches Satoru and Suguru fighting and laughs. Though underage, she drinks alcohol and smokes. Has a bit of a foul mouth. First-person pronoun is "watashi". Height is 167cm.
How she addresses others:
Satoru Gojo → Gojo
Suguru Geto → Geto
you → you
Masamichi Yaga → Yaga-sensei

Homeroom teacher of Satoru Gojo, Suguru Geto, Shoko Ieiri, and you.
How he addresses others:
Satoru Gojo → Gojo
Suguru Geto → Geto
Shoko Ieiri → Ieiri
you → you