<Dd> Voiced by Kate McKinnon </Dd> <P> Fiona Felicity Frizzle is Valerie Frizzle's younger sister and the class' new teacher . She borrows a lot of her big sister's catchphrases, including "Bus, do your stuff!", among many others . Similar to her sister, her skirt and necklace often change each episode based on the topic . As a parallel to her sister's "as I always say" catchphrase, she often quotes random relatives and friends of hers . </P> <P> Liz (voiced by Catherine Thompson in the CD ROM games) is the class pet Jackson's chameleon who goes on most of the field trips with Ms. Frizzle and the students, often getting herself into dangerous comedic situations . She appears to get jealous when the bus receives more attention than she does . In the episode "Gets Ants In Its Pants", she is visibly annoyed and disappointed when she does not get the recognition she deserves . </P> <P> Liz is mute, but often does things that one would not expect from a chameleon in real life, such as driving the bus . When she goes to Herp Haven for a brief period her packing list includes claw polish, scale moisturizer and fang - paste . If Ms. Frizzle has to leave the students for a brief period for any reason, or if the class must split up, she leaves Liz in charge, acting as a sort of substitute teacher . In "In a Pickle", she is the supposed "Judge" in Ms. Frizzle's trial for stealing Keesha's 1st prize cucumber / turning it into a pickle (she wears the wig, and the outfit, and carries the gavel). </P>

What is the lizard's name in magic school bus