Tanya Mousekewitz

Tanya Mousekewitz is the tritagonist of An American Tail: Fievel Goes West and a supporting character in all other entries. She is Fievel's older sister.

An American Tail
In the first movie, Tanya has traveled to America with her family, and misses her absent brother. When she found out that her nickname Tilly is a takeon Fievel's nickname Filly, this makes Fievel reunite with his family once again.

An American Tail: Fievel Goes West
In the second movie, Tanya has a much larger role. She tries to become a singer so much, it even attracts Cat R. Waul.

An American Tail 3-4
Tanya is reduced to a minor supporter for the remainder of the franchise. One running gag is when one or more of her relatives tells her, "Tanya don't help!"