In The Outsiders, Johny Cade is the smallest and weakest member of the Greasers gang. I would say that timid and caring are his major character traits.
We can see that he is timid (or at least nervous) in two places at least. First, in Chapter 1, Pony describes him as having nervous eyes. Second, in Chapter 2, Pony and Johnny are talking to Cherry and Marcia. All Johnny can say is "hi," which he says shyly. Then he gets nervous and tries to just watch the movie.
You can see that he is caring from this same episode. That is where he stops Dally from harassing Cherry. This shows he cares about Cherry's feelings.