Itona Horibe

Transfer student who aims to kill Koro-sensei. He is the second assassin transfer student to arrive at Class 3-E, following the previous assassin, Ritsu. He initially served as the secondary antagonist, before ultimately joining Class E for good. After being abandoned by Shiro and befriending Terasaka and his gang, Itona has since become more mellow and humble, and is now able to admit people are stronger than him, while still retaining his brutal honesty. He has also shown to be a very observant and creative individual.