Cherry is an important character because she shows Ponyboy that not all the Socs are the same and that they have their own problems too. For example, after Ponyboy tells Cherry about the time when Johnny got beat up by Socs, she tries to explain to him that not all of them are like that. "'I'll bet you think the Socs have it made. The rich kids, the West-side Socs. I'll tell you something, Ponyboy, and it may come as a surprise. We have troubles you've never even heard of'" (pg. 34-35).
Johnny is an important character because if it weren't for him, the Socs wouldn't have realized that fighting wouldn't do them any good. When Johnny stabbed Bob, it acted like a wake-up call for some Socs. Take Randy for example, after Bob was killed, he realized he was sick and tired of fighting. "'...people get hurt in rumbles. maybe killed. I'm sick of it because it doesn't do any good. You can't win, you know that, don't you?'" (pg. 116-117).
Randy is an important character because he helped Ponyboy realize that Socs were just guys. "'Bob was a good guy. He was the best buddy a guy ever had...but he was a real person too...He kept trying to make someone say 'No' and they never did. That was what he wanted. For somebody to lay down the law, set the limits, give him something solid to stand on'...Socs were just guys after all. Things were rough all over, but it was better that way. That way you could tell the other guy was human too (pg. 116-118).