Ella Mentry elementary school was named after Ella Mentry. She appears once in every series ( My Weird School, My Weirder School, etc) and every time she comes, there is a mishap at the school. She is super small.
A.J. states that Ella is about the size of R-2 D-2 in Star Wars. She is old, A.J. also states that judging from the picture of Ella outside of the office, that he thinks Ella Mentry is a "hundred million" years old. She is only 90 (As of "mr. Harrison Is Embarrisn"). She first appeared in Ms. LaGrange is Strange, and last appeared in "Mr. Harrison is Embarrisin".