This article is about an aardvark with red hair who apparently always hangs upside down on the climbing frame, reading. You may be looking for a character she is usually mistaked as, 3rd Grade Female Aardvark.
The picture used in this is unsatisfactory.
Reason: If she is in another episode, should be a picture of her not upside down.
Please feel free to replace it so it conforms to Arthur Wiki conventions.

"Unknown Female Aardvark (Number 7)" is not an official name.
Unknown Female Aardvark (Number 7)
Upsidedown reader girl
Gender Female
Animal Aardvark
Hair color Red
Complexion Yellow
Cartoon debut "Buster's Secret Admirer"
Unknown Female Aardvark (Number 7) is a background character who has only been seen in "Buster's Secret Admirer".

She is known as the girl with red hair who reads upside down