Klaus Anderson is, first and foremost, a mediator. He seems to have taken it upon himself to try and solve all the quarrels that he can spot amongst the students, and does his very best to ensure that the situation ends up so that both parties are satisfied. Of course, this sometimes comes at the expense of his own lectures, and thus, he may not get as much material covered as he'd have wanted to. Indeed, it sometimes seems that he is considerably behind in his subject than what the timetable suggests. Therefore, the best way to keep this mellow and kind-hearted man in schedule is to not trouble him.
Klaus' lectures tend to be fully about the subject at hand, but they drag on depending on how many interruptions he can spot...
Yuki can't stand Mr. Anderson. She (along with several other similar types, like P.K.) tend to slink off the moment they can.
Klaus is like the faculty's hidden weapon against delinquents and troublesome students.