Itona Horibe

Itona Horibe is the second assassin transfer student to arrive at Class-E, following the previous assassin, Ritsu. Since his first appearance, he does not attend classes, but does reappear in a few chapters throughout the series.

Personality
When he was introduced, he had a deep obsession with killing his supposed brother, Korosensei.

Deep down, Itona deeply dislikes losing, especially with the event of his father losing his company. Because of the miserable events throughout his past, he has become detached from society.

When reintroduced to the classroom and abandoned by Shiro, Itona has cooled down somewhat, yet still retains his desire to kill Korosensei (without calling him "brother"). Thanks to Terasaka's words of encouragement as well as Class E's admiration of his abilities, his desire to kill Korosensei has become less self-centered and is now willing to work together with Class E to attain his goal. Because of this, he has become much more sociable and involved with his fellow classmates.

History
Itona is the son of Horibe Electronics Factory's President. Until his father ran out of money and left him alone without any shelter, money and food.

Quotes

 * (To Class 3-E male students, Chapter 88) "It's okay if i fail 100 times, i'll kill him for sure in the end. You'll help me out, right guys?"

Trivia

 * He was called "Rolling Riser" during class 3-E training using code names.