Liesel's beauty lies in her growth and development as a character. Her likable and "beautiful" qualities are easy to see in her eagerness to learn, her fiercely loyal nature, and her honest unprejudiced attitude about people who are different (Max). Her ugly side lies in her tendency to not say what she feels, to hold back words that should've been spoken, and to use words also in sometimes harmful ways. The author describes her chastisement of Mrs. Hermann as an almost physical beating, and Liesel neglects to tell Rudy and Mama how much they meant to her.
Papa's beauty lies in the his kindness, compassion, and love for Liesel. His soul is seen symbolically through his accordion which breathes for him and soothes Liesel in her moments of distress. Papa's ugliness is seen in his deep depression which comes from his tendency towards guilt. His kind actions toward a Jew force Max to leave, and Papa is deeply disconcerted over Max's departure because he feels guilt at not helping him survive. Papa even technically, puts his family at great risk and danger in ever agreeing to help Max (a fix for his guilt over Erik Vandenburg's death).
Mama's beauty is described as having a compartmental heart with shelves and shelves full of love. The way Mama showed her love was the ugly side of her. Mama was always quick with violence and curt language and slow with affection; however, one could say that this was Mama's way of protecting Liesel and teaching her quickly in order to keep her safe. Mama fed Max without question, so she was selfless and giving, just in a different way than Papa.
Rudy's beauty is that he can even break Death's hear; even Death loves Rudy because throughout the book, he is so full of life. His loyalty to Liesel and his chase of her is charming and endearing. If Rudy had not been so prideful, he would have not won so many races during the Hitler Youth Olympics, he would've not been noticed by the Nazis, and he would've not been asked to go to their school. Even though Alex Steiner did not let Rudy leave, Rudy's pride and arrogance are often a source of "ugliness" for him.
Max is a beautiful character in that he learns to find friendship in an unlikely candidate - a young German girl. His love for words and thought shape Liesel into a free thinker, and his handmade books are both special and insightful in their own ways. Max's ugliness was his guilt over choosing to leave his family behind in order to take an opportunity to save his own life during Kristallnacht. Max's guilt over this difficult and soul-rendering decision is with him constantly.
Mrs. Hermann, though wealthier than the Hubermanns, is also a type of "victim" of her circumstances. She did not wish to fire Liesel's Mama, but her husband did-she follows his demands. Her suffering is beautiful, and her passion for books...
is beautiful, but the suffering becomes too much of a crutch. She becomes more of a ghost than a real woman and loses touch with humanity before Liesel snaps her out of it with her harsh and cruel words.