Rokusuke Kouenji

Rokusuke Kouenji is one of the students of class 1-D. He came from a well-known family of scholars. However, he ended up in D-Class for his egotistical behavior.

~!In Year 1, Volume 11, he watches a scuffle between Hirata and Mii-Chan, which ended with Hirata pushing a desperate Mii-Chan, who was trying to help him, on the ground. Kouenji then intervenes and states his annoyance at Hirata "for treating a girl wrong" referring him as "like a fly, very irritating". His friendship with Mii-Chan is then showed to progress in Year 2, Volume 5, when they are seen walking together often, and Mii-chan referring to him as "someone easy to talk to" when asked about their relationship by Satou and Matsushita."!~

~!During the Second Year Uninhabited Island Special Exam, he strikes an agreement with Suzune Horikita, in which he would try for a first-place finish and Suzune would reward him with complete protection from class vote expulsion until graduation and exempt him from being forced to co-operate with the rest of the class, which he wins.!~

(Source: You-Zitsu Wikia)