Holden enjoys spending time with his younger sister Phoebe throughout the novel and goes out of his way to talk to her after flunking out of Pencey Prep. In chapter 10, Holden elaborates on the positive personality traits of his younger sister by mentioning that she is extremely intelligent and funny. Interestingly, Holden says,
I mean if you tell old Phoebe something, she knows exactly what the hell you're talking about (Salinger, 37).
Phoebe's ability to understand and connect with Holden is what he cherishes the most. Throughout the novel, Holden's immaturity and cynicism prevent him from developing authentic relationships with people his own age. Unlike the "phony" adults, Phoebe is genuine and innocent.
If there is one fear that Holden has throughout the novel, it is entering the world of adulthood. Fortunately, Phoebe embodies everything that Holden values about childhood, and she is one of the few characters who truly understands him. Unlike Holden's sagacious professors, selfish peers, and superficial associates, Phoebe is a sensible, naive child who cares about her older brother's well-being.
Holden not only appreciates the fact that they share similar tastes in entertainment but also values her listening skills. She is not overly judgmental, and she even looks up to him. Holden also enjoys her red hair, which reminds him of Allie. Overall, Phoebe is an intelligent, sympathetic younger sister who truly cares about Holden. Holden values his younger sister because she is one of the few people he can have a genuine conversation with and not feel like he is being judged.