People from southern California often say the word "the" before describing a road. They might say, "You take the 101 to the 1". People from Pittsburgh never put a "the" before giving directions. They might say, "You take 79 to I90".
Researching for my new book, THE LINK, I have tried to find links to slang in Alaska and slang in Oregon. It's taking time, but I am getting to know some of the local jargon. You too should research the way people talk to one another in the town you find your characters living in or moving to.
Alaskan slang: http://www.untotheuttermost.com/Alaska%20Slang.html
What about the things your character covets? Does she own a special necklace? Is it in style now, or really old? What about her room? What things are in there that will give your reader a tell about your character?
If I wrote that my main character in THE LINK, Seit, hid all of her artist brushes under her bed so her crazy Uncle wouldn't find them and sell them. What would you guess about her? About him?
The things, and how your characters use or hide them will tell a lot about your character.
The things in the town your character lives also give a full picture of your character, and how they grew up, or what they are dealing with now.
In Vermont there are tractors for sale in many yards. They are old-fashioned looking tractors, like the red ones in toy stores. Do you ever see tractors for sale in your town? In a city? With this small detail, you can let your reader know where your main character grew up.