Lisa Marie Simpson, voiced by Yeardley Smith, is Homer and Marge's oldest duaghter and the middle child on The Simpsons.  Lisa is very intelligent, plays the saxophone, is a vegetarian, Buddhist, and definitely a bit of a young political activist.  She's basically the complete opposite of her brother, Bart.

Lisa Simpson Quotes

Homer: Oh, I get it, you're all going to try to convince me that my life is great just like it is, right?
Lisa: Are you kidding? We couldn't even convince you that Bruce Wayne is Batman.
Homer: Oh, come on, that billionaire playboy. He's too busy socializing at cocktail parties and managing the affairs of the Wayne foundation
Marge: (whispering) Don't open this one again.
Lisa: Why does he think Alfred is friends with Batman?
Marge: Just stop.

I've never been called "fierce" before. "Strident." "Hectoring" has been tossed around.

Lisa

The Simpsons Quotes

Oh, I have 3 kids and no money. Why can't I have no kids and 3 money!?

Homer

Dearest Edna, I must leave you. Why, I cannot say. Where, you cannot know. How I will get there, I haven't decided yet. But one thing I can tell you, any time I hear the wind blow it will whisper the name Edna. And so let us part with a love that will echo through the ages. ---Woodrow

"Woodrow"