Companion
Character Role Analysis
Sal Miller
No need to look far and wide for Billy's little buddy because she's his very own sister, Sal. Sure, Sal ticks Billy off to no end in the beginning—okay, in the middle, too—but in the long run she also becomes his pal. Not only does she look up to her big bro and want to grow up like him, but she also becomes his partner-in-crime. When they try to stay up all night together, that seals the deal. These two are companions for life.