He is a high school dropout at 16 ½, 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 that "(he doesn't need to even touch a drop of alcohol) he gets drunk off of 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.
The actor (Rob Lowe) who played Sodapop Curtis in the movie "The Outsiders" in 1983 asked S.E. Hinton what happened to Sodapop after the events of "The Outsiders" movie, she told him that Sodapop falls in love with a girl named Samantha and she cheats in him, like Sandy. After months of pressure from Steve, Sodapop goes on a blind date and meets his future wife, Amanda.