Before Liesel knows how to read, she starts stealing books in order to learn. She keeps on stealing them even AFTER she learns. This proves that Liesel is dedicated.
Character Trait: End
"Liesel would not get out of the car." This supports the fact that she is scared and shy.
In many parts in the book, Liesel breaks into the mayor's house, running the risk of getting caught by the mayor or his wife. This shows that Liesel is brave.
"Her hands were sore by page 3. Words are heavy, she thought, but as the night wore on, she was able to complete eleven pages." This shows Liesel is hard-working. Even though she got tired, she kept working.