Catherine had 3 different voice actresses in Arthur. Patricia
Rodrigues was her first voice actress (Rodrigues also voiced Sue
elen) from season 1 to season 7. In season Alexina Cowan replaced
Rodrigues as the voice for Catherine until season 15. In season 16
Robyn Thaler hickey now voices Catherine and so on. Btw Catherine
is Francine Frensky's older sister.