Isabella Garcia-Shapiro who secretly has a crush on Phineas, is the leader of the Fireside Girls Troop 46231 (though mistakenly identifies it as 46321 on one occasion). She lives across the street from Phineas and Ferb and often volunteers to help in their projects throughout the summer to earn more Help Thy Neighbor patches (of which she has earned more than 50). She was born to a Hispanic mother (Vivian Garcia-Shapiro) and a Jewish-American father.She is known for her phrase: Whatchya doooooin? She has a chihuahua named Pinky, who is a secret agent.