Akuma no Riddle Wiki

Irena (イレーナ; Irena) or most commonly referred to as Irena-sensei (イリーナ先生; Irena-sensei; lit. Professor Irina) by Kouko Kaminaga during her flashback scenes. She is an additional character in the manga and anime series Akuma no Riddle. She was also the teacher who trained Kouko Kaminaga to become an assassin from childhood at Clover Home.

Apparently, Kouko Kaminaga had went on a mission to kill an unknown target by wiring bombs to their car; Irina said that the target would be arriving shortly after she had wired the car and that Kouko had better go hide. However, after Kouko had gone and hid herself, an accident occured and the bomb exploded sooner, causing her death.


She seemed to be a very kind and generous person who cared a lot for her students even though she was training them to become assassins.


She has long brown hair and green eyes and a tan complexion.

Skills and Abilities

Since she was a teacher who was training kids to become killers, it is suggested that her skills and abilities were great.


She was Kouko Kaminaga's assassin teacher but died later on due to a bomb malfunction caused by Kouko, who still blamed herself for her death.


  • She was a teacher at the orphan protection and development home, which was actually an international assassin management training facility.