3rd Grade Female Aardvark is an unnamed third grader who debuted in the fantasy sequence Arthur was having, which took place during the opening to the episode "D.W., Dancing Queen". It's unknown if she is an actually student at Lakewood Elementary School. She made another appearance in the episode "World Girls" where she was seen at the World Girl World mall. Her second appearance also verified that she is indeed a real character instead of a fantasy character. She also has a twin sister.