Who is Kathy in The Outsiders?

There isn't a character named Kathy in S.E. Hinton's "The Outsiders". It's possible you're thinking of a different character or a different book.

Could you perhaps be thinking of one of these characters:

* Sherri "Cherry" Valance: A Soc girl who develops a connection with Ponyboy.

* Marcia: A Soc girl who dates Bob Sheldon, the Soc who dies at the beginning of the novel.

* Sandy: Ponyboy's former girlfriend who moves away.

If you could give me more context about what you remember about Kathy, I might be able to help you figure out who you're thinking of.