Mrs. is Junie B. Jones' kindergarten teacher. When Junie B. meets her she cannot remember her last name and just calls her Mrs.
In Junie B. Jones & the Stupid Smelly Bus, when Junie B hides in the school, Mrs. tells someone that Junie B. is lost and did not get on the bus and sends people out to find her.
Mrs. can be quite hard on Junie B. Jones and Paulie Allen Puffer. She has shown a warmer side to her though. Both of these sides have been shown in Junie B. Jones is a Graduation Girl.
Mrs. seems to be much more professional and school oriented compared to Mr. Scary. She does not let the class go off topic as much as Mr. Scary and she is more firm her pupils in general.