Wendy Stinglehopper is a girl who is kissed by Baljeet. She was on the math team with him. She wanted a big hat for Christmas. Isabella described her as "That pretty girl from the math team". Baljeet appears to have romantic feelings for her. ("Phineas and Ferb Christmas Vacation!")
Wendy has long brown wavy hair with a blue hairband. She wears a light blue shirt with dark blue dots and dark blue pants with light blue dots (these may be her pajamas). She also wears grey shoes.
Probably likes and is good at math because she's on the math team, which makes her similar to Alex Dunphy from Modern Family, who is also played by Ariel Winter.