You can describe your characters in many ways. One common way is to describe their physical appearance. Are they tall? What color hair do they have? What are they wearing? Another way to describe a character is their characteristics. Who are they as a person? Are they nice? Are they dumb? Do they lie a lot?
Here are some adjectives you can use to describe a person:
Tips:
-You don't always have to describe what the characters are wearing, only if it's important to the story.
-Try to make simple adjectives more descriptive (for example: "Her hair was as golden as the sun raining down upon her." instead of just "She's blonde.")
-Try to not only say positive things about your character. Nobody is perfect :p