EJ is a tall and muscular woman who has a square-like appearance similar to Jeff, her son. She is a larger person who has a tendency to dress masculinely. She wears a long sleeve red shirt, dark blue jeans, and brown boots.
Like Jeff, she also has brown hair and black eyes.
- She seems to be a stay-at-home mom. Jeff even said in "Dollar Hunt", "We could just ask my mom to make a casserole. She's got nothing but free time."
- She leaves a note on Jeff's lunch bag in the episode "Average Jeff", however he throws his lunch away and replaces it with an apple.
- It is revealed in "Chimney", that EJ along with Sue doesn't let Jeff have a dog. It could be that one of them is allergic to dogs.
- In the Sneaky Peeky, it's revealed that she was in a film making class when she was in college.
- Her full name is revealed as Eleanor Josephine in "Cloris".