Stacy Hirano is Candace Flynn's best friend and one of the stars in The FT Squad's Adventures With Phineas and Ferb. She often acts as the voice of reason for Candace when she's in the mood of busting her brothers. Unlike Candace, Stacy is fascinated by Phineas and Ferb's inventions, and sometimes finds herself participating in having fun with them. Stacy likes having fun.
- Stacy will appear in The FT Squad's Adventures With Phineas and Ferb, where she'll meet the FT Squad; Kyle the Otter, Kaytlin the Otter, Rudy the Alligator, Dennis the Frog, Cassidy the Pelican, Kimmy the Elephant, and their allies, Wubbzy, Daizy, Widget, Walden, Simba, Nala, Timon and Pumbaa. She treats the team nicely, just like Phineas and Ferb.
- Stacy also treats Kyle Larman nicely. Often times she finds Kyle cute, and she expresses it mostly when Kyle says hi. If Stacy finds herself in one of Candace's attempts to bust Phineas and Ferb, Stacy will hesitate to bust Kyle.