Your character has to live somewhere, and that place needs to be reflected in the things that your character does.
For example, if the protagonist lives in a homeless camp, then life centers on food, shelter and feeling safe, especially at night. Cleanliness is an issue as well as finding resources to help with clothes, laundry and food.
Let’s say the protagonist is a princess who lives in a castle. That’s a completely different sort of issue. How the princess treats and interacts with employees tells us whether or not she is arrogant and sees them as a subservient class. Since she doesn’t have to worry about basics, what she does do becomes a part of who she is.
If your character is a spy, then she is constantly on the move. She might not have an apartment somewhere, instead living in one hotel after another. What kinds of hotels? Cheap or deluxe? The type controls amenities and safety.
Your job is to decide where your character lives and then write a scene in that environment. Bring in secondary characters that would be in that site. Have your character interact with them, keeping in mind what you want us to know about how he treats others.
Make the scene substantial enough that the reader gets a feel for your character’s personality. Include dialogue, body posture and looks.
Reread. Does your character’s personality come through? If not, then what changes should you make?
Have fun with this one.