She is tall, thin and has thick brown hair that almost reaches her elbows. She wears large round glasses, a purple jacket over a white shirt and a yellow pencil skirt, she also wears high white socks and pink heels, she also seems to have small bags under her eyes.
In "Neighborhood Grill", Ms. Baker is set up on a blind date, and she doesn't wear her glasses, and has bunched up her hair to add volume, and instead of her usual outfit, she wears a short purple dress with spaghetti straps and pink heels, she also wears this in "Valentimes".
Ms. Baker is very talkative and tends to talk quickly. She is a very patient teacher (putting up with Clarence and his classmates as they cause all sorts of minor problems), but is easily overwhelmed. She is a cat-lover and owns at least one (she has a mug with their picture on it and also a framed picture of the two of them on her desk). She is also shown to be a kind and caring teacher.
In "Suspended" it is revealed that she switched to contact lenses.
Ms. Baker's cellphone that appeared in "Neighborhood Grill" and "Turtle Hats" is mostly a retrofitted feature phone that has a camera and a smartphone-like interface, but has a slower data connection (relied on 1G and iDEN).
Ms Baker's pet cat is named Beauford T Pusser and was based of a cat in Spencer Rothbell's apt complex as a kid.
Ms. Baker had her name change from Ms. Bernstein to Ms. Burnett to Ms. Baker.