i don't know 3 character traits for kate barlow and why
Be sure you know what a character trait is.
http://cte.jhu.edu/techacademy/web/2000/kochan/charactertraits.html
Then read these sites about Kate Barlow.
http://library.thinkquest.org/J0113188/legend.html
http://www.imdb.com/character/ch0015858/bio