Jonas wants his father to chastise Lily because he is beginning to see the flaws and injustices in their society, and he feels upset when Lily is disrespectful towards the rules and norms that are expected to be followed. He believes that if his father enforces the rules, Lily will understand the importance of behaving appropriately.
In The Giver, the children are named Jonas and Lily. Jonas is the protagonist of the story, while Lily is his younger sister.
Lily
The main character in "The Giver" by Lois Lowry is a boy named Jonas. He is chosen to be the Receiver of Memories in his community and learns about the true history of the society and the role of the Giver.
Lily
The main characters are Jonas, Asher, Fiona, Lily, Jonas's parents, and The Giver.
Jonas had a bear as a comfort object in "The Giver." It was a symbol of his childhood innocence and connection to his past before entering the world of the Community.
Jonas' sister is named Lily and she was assigned to Jonas' family.
Because in that utopian society they have made animals obsolete. No one but Jonas and the Giver have seen an elephant.
I think she just likes taking care of the Newchildren. She doesn't have any special talent, like Jonas, though.
Judge
Lilly was born into Jonas's family. She is Jonas's younger sister and they grew up together in the same household.
Lily teases Jonas by calling him "Giver" because she knows he holds the position of Receiver of Memory. This teasing is a playful reference to his role in the community.