The Reaper

God of Death is the best assassin on the world, his real name and appearance is still unknown.

Appearance
Contradict to his name,God of Death is somewhat has a innocent looking and firendly smile.He has short hair and always seen with his cap.

Personality
As world's best assassin, God of Death is a sadistic person, saying terrifying things such as dividing Irina Jelavic into pieces and drowning Korosensei with the entire Class 3-E students so naturally.

Plot
He is first mentioned by Lovro when Nagisa asks about the world's best assassin. He appeared to Class 3-E in the disguise of a florist in order to sell them some flowers, which they would later give to Karasuma to give to Irina Jelavic. He had planted a bug in the flowers to gain Intel on Irina before moving in to kidnap her. After Korosensei left for Brazil, he took the opportunity where there were no teachers available to approach the students. He showed them a picture of Irina in captivity and said that if they didnt resuce her he would dismember her and then send her back to school piece by piece. This was also where he displayed his inhuman powers, such as natural blending in with the classroom to appear invisible and disappearing silently and without a trace after throwing some petals in the air.

Later, it was revealed that he assumingly kidnapped Irina Jelavic and made her his ally to lure Class 3E into rescuing her, only to make them into baits for kidnapping Korosensei. When Karasuma fought with him, is was revealed that he removed the skin of his face to further polish his disguising abilities. What is left of his face is his skull.

Quotes

 * (To Class E students) "It's impossible for humans to reap the God of Death. Do not fear, there is only the God of Death reaping man."