Clarisse is indirectly characterized as a unique in Fahrenheit 451. One example of this is her in depth thinking of everything, and she isn't like the other people in the community. This is indirect characterization because it does not specifically tell us that she is unique.
Clarisse was directly characterized as wise. One example of this is how she has so much wisdom of the past and how the world used to be before the new government was made. Also, she has a very good relationship with her uncle, who is also very full of wisdom. This is direct characterization because it says that she is wise directly in the text. And you don't need evidence to prove she is wise.