Ah, a zombie trhead, but a pretty god one.
Bad: In about 5th grade, a close friend basically evolved into a bully and I had to cut ties.
Good: In the 6th grade a new kid was in school and he was only there for one year, military family, but he was like a real peacemaker. He was the natural alpha, the cool kid but not in that, "I'm cooler than you" way. He didn't tolerate nonsense or bullying and welcomed everybody. In fact, it was the only time I can remember where all of the boys in out class sat at the same luncch table (small school) - the one exception were the boys who had turned on me the previous year.