What adjectives describe Johnny Cade in the book "The Outsiders"?

One of the first adjectives that comes to mind for Johnny Cade is "young." He is only sixteen. He's not even a legal adult. I would also describe him as "nervous." This is probably one of his defining characteristics. Ponyboy even comments on it early in the book by describing him as something like a scared puppy:

Johnny Cade was last and least. If you can picture a little dark puppy that has been kicked too many times and is lost in a crowd of strangers, you'll have Johnny. He was the youngest, next to me, smaller than the rest, with a slight build.

The reason for this is because his home life is terrible. His parents are abusive both physically and verbally. Additionally, Johnny was jumped and beaten to within inches of his life by a group of Socs. The above description from Ponyboy provides a few other good adjectives to describe Johnny as well. He's "small" and "slight." Despite his size, Johnny has a good heart and is "brave." It's Johnny who stands up to Dally in defense of Cherry and Marcia, and Johnny runs into the burning church to save those kids.