Akuru's the type of guy who'd rather be left alone with a textbook than deal with people. He's sharp academically and takes school seriously, though he chose his local high school specifically because the better-ranked schools were too far to commute to. As for his social life—there basically isn't one. Yoshiko, his classmate, is constantly testing his patience with her ridiculous behavior, and Akuru doesn't hold back, resorting to physical punishment when her antics get bad enough. He's made it clear he has zero interest in expanding his friend group, but Sayaka decided to befriend him anyway out of what amounts to pity—he accepted it without enthusiasm.
Running joke with Akuru: he's cursed when it comes to exams. No matter how hard he studies, he always manages to fall just short of a perfect score. It's become such a pattern that fans find it almost comedic at this point.
Content compiled by AnimeList.moe from publicly available sources.