Describe Ponyboy, Sodapop, and Darry's relationship in The Outsiders by S.E. Hinton.

Initially, Darry and Pony's relationship is confrontational, but they end up working out their differences by the end of the novel. 
Ponyboy is Darry's younger brother. Ponyboy believes that Darry doesn't care about him, and tries to avoid his older brother. Ponyboy views Darry with contempt and thinks Darry is too hard on him. He favors Sodapop over Darry and doesn't appreciate that Darry continually bosses him around.
Darry views Ponyboy as a naive adolescent who doesn't use his head. Darry is worried about his brother's well-being and tends to overreact when Ponyboy makes bad decisions. Darry was forced to care for his brothers after their parents died in a car accident and has no prior experience performing the role of primary caregiver. Instead of listening to Ponyboy and treating him with compassion, Darry openly expresses his anger towards his youngest brother. Ponyboy resents the fact that Darry slapped him and ends up running away.
Sodapop is the mediator between Darry and Pony. He is close to Ponyboy, but also supports Darry. He struggles choosing sides between his two brothers when they fight. 
At the end of the novel, Sodapop tires of listening to Darry and Ponyboy fight, so he runs out of the house. After Darry and Pony catch up to him, Sodapop explains how their arguments negatively affect him. Darry eventually learns that he needs to be more sensitive to Pony's needs and treat him with more respect. In addition, Ponyboy gains insight into his brother's sacrifice and love for him.