Tanya Mousekewitz

Tanya Mousekewitz is the eldest child of Mama and Papa Mousekewitz and the older sister of Fievel and Yasha. She’s a cheerful, optimistic and caring young female mouse who is famous for having faith that Fievel was alive when her parents refused to believe it in An American Tail. She looks and acts a little different in every sequel; in Fievel Goes West she is shy and wants to be a singer, in The Treasure of Manhattan Island she is spunky and sarcastic (although this began to show in Fievel's American Tails), and in The Mystery of the Night Monster her personality is much the same, but she tries to act more adult, partly because she has a deep crush on newspaper editor Reed Daley.

Tanya Mousekewitz is a signature character of the Sesame Street parody of the same name.

"An American Tail" and "An American Tail: Fievel Goes West"
In An American Tail, she wears a red babushka (headscarf), a blue blouse with a navy jumper dress and frilly white pantalettes. She was also much closer to Fievel's age. She looks much the same as this in The Treasure of Manhattan Island, though she's coloured differently. In The Mystery of the Night Monster she looks taller than in the last movie, and her hair is very short. Although she normally wears her regular outfit with her babushka (seen in one of Fievel's dreams), she instead wears her work outfit, consisting of a slimmer, professional-looking white blouse and purple ankle-length skirt, with a large blue bow on her blouse.

In An American Tail: Fievel Goes West, she was much older (trading cards released at the time of the movie claim she is 16, although the novelisation of the first movie claimed she was eight, a year older than Fievel) and her age range from Fievel was increased. This was her oldest incarnation, as in later sequels she is aged down again. She dropped her red babushka for a long ponytail and an orange and brown dress and no undergarments. Between 1998 and 2015 she appeared in this form on the cover of the DVD and Blu-Ray releases of An American Tail despite looking different in the actual film, for unknown reasons. In Fievel's American Tails she looks almost the same, but streamlined to make her cheaper to animate (with only one tuft of hair in the front, and her cheek tufts missing).

"Tanya Mousekewitz" ("Sesame Street" parody)
In the Sesame Street parody of the same name, Tanya Mousekewitz always appears dressed as Moonlight Cookie in every parodied episode covered, except for a few episodes that mention a camp or a trip.