Gallery:Isabella Garcia-Shapiro/Season 3

"Hi, Phineas. Whatcha doin'?"

- Isabella's catchphrase.

"Calm down, girls. Have you forgotten who we are? We're Fireside Girls Troop 46321 and we never give up!"

- Isabella to Fireside Girls troop 46321

Isabella Garcia-Shapiro is the neighbor and best friend of Phineas and Ferb. Isabella has a very big crush on Phineas. She is the leader of Fireside Girls Troop 46231, and often volunteers to help in Big Ideas, usually with her troop involved.