Irina Jelavic

Irina Jelavic, also known as Bitch-sensei, is a professional assassin and language teacher. She is confident, seductive, and charismatic with a dominant personality. Formerly an Eastern European intelligence agent, she is an only child estranged from her parents. She enjoys reading mystery novels and collecting rare languages but dislikes incompetence and disorder. She witnessed a betrayal by a close friend and has been trained in various martial arts. Known for her seductive appearance and slim figure, she is introduced as a professional assassin sent to kill Koro-sensei. Later, she becomes the language teacher for Class 3-E and struggles with gaining respect from the students but eventually forms bonds with them and becomes a respected member of the teaching staff due to her skills in assassination, seduction, charisma, and multilingual abilities.