Sodapop Patrick Curtis, nicknamed "Pepsi-Cola," by his deceased father, is the middle Curtis boy. He's said to be "movie star handsome," and has silky, dark gold hair (real tuff) that he combs back with dark brown (recklessly, dancing) eyes and a goofy grin that you can't help but love (which is noted by Ponyboy after getting jumped by the Socials).
He is a high school dropout at 16½, and works at the local DX (gas) station with his best buddy, Steve, fixing cars and working the cash mostly. It's also mentioned that "he attracts (girls) like flies to honey," it is also said that girls, both soc and greasers will get gas there just to stare and flirt with him.
He is idiolized by his younger brother, Ponyboy, and feels torn between both brothers, "like tug-a-war".
Sodapop is dating, and in love with Sandy near the beginning of the book, a pretty (greaser) girl with china blue eyes and blonde hair, before Ponyboy and Johnny turn away to the church in Windrixville, but when they return, Pony is surprised to find out that they broke up. It turned out that she was moving to Florida because her parents didn't approve of the idea of Soda marrying her. She clearly didn't love him back, and he was heartbroken.
In the book, it is also said by Ponyboy that Soda enjoys dancing or a drag race without even getting near alcohol, and that "it's rare to find a kid in our neighborhood who doesn't drink once in a while. But Soda never touches a drop. He doesn't need to. He gets drunk on just plain living". Sodapop enjoys racing, fighting, dancing, and basically anything that would blow off steam.
When asked by his younger brother why he liked to fight, he simply replied that it was fun and a challenge for him.
Sodapop Curtis used to work in a stable when he was twelve years old. He took a specific liking to one horse named Mickey Mouse. This horse was "a dark-gold buckskin, sassy and ornery, not much more than a colt". Sodapop loved Mickey Mouse as if he was Soda's horse, and Mickey Mouse loved Soda; he'd only come when Soda called. "Mickey Mouse was a mean horse. He kicked other horses and was always getting into trouble." One day Mickey Mouse got sold, and Soda was heartbroken. Soda cried all night long after Mickey Mouse was sold.