Hazel Elizabeth Deborah Parker, who goes by her nickname of Squeaky, describes herself with the adjectives little, skinny, squeaky, and fast.

The narrator of Toni Cade Bambara's "Raymond's Run," Squeaky is a confident girl who loves her brother Raymond, a boy who is mentally challenged. Describing herself as the "fastest thing on two feet" and as "Miss Quicksilver," Squeaky takes her brother with her on her runs. When she is on 34th Street, she "prances like a pony to let people know" that she is fast. Her mother is embarrassed by this prancing, so she walks ahead of her.

Squeaky contrasts herself with others such as Cynthia Procter, saying that she does not pretend as does Cynthia. For instance, Cynthia pretends to fall onto the piano stool in music class. Then "she decides just for fun" to try "out the old keys." And, then, Chopin's waltzes—which she has long practiced—"just spring out of her fingertips...."
But, Squeaky, who is honest about things, lets herself be seen practicing. "And you can see me any time of day practicing running." She refers to herself as "Miss Quicksilver."

After the race in which Squeaky and Gretchen compete, they become friends. Squeaky is proud, but she is especially proud of her brother Raymond, who has kept up with Squeaky by running outside the fence parallel to her.

Squeaky is described as “skinny” with a “squeaky voice.”

The narrator of this short story is a young girl whose real name is Hazel Elizabeth Deborah Parker.  She describes herself as a “little girl with skinny arms and a squeaky voice.”  Three adjectives in this sentence are little, skinny, and squeaky.  An adjective is a word that describes a noun.  

The use of adjectives to describe a character is called direct characterization, but characters can also be indirectly characterized.  Consider how Squeaky describes herself as tough and no-nonsense.

And I don’t play the dozens or believe in standing around with somebody in my face doing a lot of talking. I much rather just knock you down and take my chances…

This indirect characterization may not give us direct adjectives to describe her, but it tells us that Squeaky likes to stand up for herself.  We might consider her brave, bold, or clever, even though the author does not give us these adjectives outright.  She takes her job protecting her handicapped brother very seriously.  If anyone picks on him, she is ready to fight.  She also takes pride in her ability to run very fast and win races against just about anyone.