Ponyboy absolutely adores his brother, Sodapop. Their relationship is one of close brothers and friends. Sodapop stands up for Ponyboy when he and Darry get into fights and also acts as Ponyboy's confidante and shoulder to cry on.
His relationship with Darry, on the other hand, in not nearly so open and loving. Ponyboy's relationship with Darry more closely resembles that of a father-son relationship because Darry feels like he must be the disciplinarian of the household after the boys' parents died. Ponyboy worries that Darry does not love him and that he views him more as a burden than anything else.
Ponyboy and Darry didn't get along with each other at first, due to the fact that Darry doesn't want Ponyboy to fail school like him. But soon Ponyboy found out why he was tough on him and got along with Darry. Ponyboy loved his brother Soda'pop or Soda. They never fought and they were like best friends. Except Soda is best friends with Steve.