Kenji Yanagimoto

Grade: First Year (Later Second Year)
Age: 15-16

Kenji has short grey-black spiky hair, he wears a pair of half-rimmed glasses that hides his eye color and he is roughly Takatoshi Tsuda's height.

Unlike Takatoshi Tsuda, who chose to go to Ousai Private Academy because it was close to his house, Kenji is hinted as being one of the 'harem-seekers' Aria Shichijō mentions at the start of the series (i.e. boys who deliberately chose to go to Ousai because it had just become co-ed and so the boy-girl ratio was skewed heavily towards the girls). He was confident that due to this ratio, he could at least expect chocolates on Valentine's Day, but Takatoshi pointed out that just because he was one of the few boys, that didn't automatically mean girls would be interested in him.

Kenji was initially jealous of Takatoshi being chosen for the Student Council, since all the members (except for that one kid) were great beauties. He expressed his wish to take Takatoshi's place, but backtracked when Takatoshi offered to give his position to him. He knew the job would be difficult, and wanted no part of it. This irritated Takatoshi.

Despite his original harem-seeking objective, once settled Kenji is a normal teenager, especially compared to the more eccentric characters of the series.

(Source: Seitokai Yakuindomo Wiki)