<Li> Queen Sara Saturday (performed by Fred Rogers)--Queen Sara Saturday is King Friday's consort . She was first introduced as a commoner from Westwood on Episode #32 and the two married in Episode 1015 . In the third season (episode 1117) they had a son, Prince Tuesday . Queen Sara is more rational and level - headed than her husband . Queen Sara was named for Fred Rogers' wife, Sara Joanne Rogers . </Li> <Li> Prince Tuesday (performed by Adair Roth (pre' 79 series), Fred Michael (1979--1980), Charles Altman (1981--1986), briefly Carole Switala, Lenny Meledandri (1987--2001))--Prince Tuesday is the son of King Friday and Queen Sara . Born in the third season (episode 1117) and named for the day of the week when he was born, Prince Tuesday is one of only two characters to age during the course of the series (he starts as a baby, then a toddler; and from 1979 onward, he is elementary school - aged). He is curious and enthusiastic and attends the school in "Someplace - Else". </Li> <Li> X the Owl (performed by Fred Rogers)--X the Owl lives in an old oak tree in the Neighborhood . He is eager and cheerful and has a strong desire to learn new things . Many of X's stories involve assignments from the Owl Correspondence School and he idolizes Benjamin Franklin . He also has trouble making decisions . X was the third puppet to appear on Children's Corner . </Li> <Li> Henrietta Pussycat (performed by Fred Rogers)--Henrietta Pussycat is X's neighbor and lives in a small yellow and orange school house supported by a strong limb on the tree . Early episodes established her as the governess of several nice mice, thus the schoolhouse . She has a habit of randomly inserting "meow" into her sentences due to being a cat . When she was first introduced, she could only say "beautiful", "telephone", and "Mister Rogers", in addition to "meow". She is anxious, preoccupied with beauty, and prone to jealousy . She also was the flower girl at Betty and James' wedding . She is the fourth puppet to appear on Children's Corner . </Li>

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