Candace Flynn is Phineas and Ferb's teenage sister and one of the characters in The FT Squad's Adventures With Phineas and Ferb. Candace is aware of the incredible inventions her brothers create throughout the summer, but she does not approve of them. She often times tries to bust them by showing their mother the inventions and ideas, but most of the time it fails. There have been some cases however, where Candace actually joins Phineas and Ferb on their adventures, either for the sake of doing something that can help her, or to have fun. Despite her irritation, she cares for the welfare and safety of her brothers.
- Candace will appear in The FT Squad's Adventures With Phineas and Ferb, where she'll meet the FT Squad and their allies; Kyle the Otter, Kaytlin the Otter, Rudy the Alligator, Dennis the Frog, Cassidy the Pelican, Kimmy the Elephant, Wubbzy, Daizy, Widget, Walden, Simba, Nala, Timon and Pumbaa. In this series, Candace doesn't trust them and tries to bust them along with her brothers. Because of her rude attitude and crazy behavior, the squad finds Candace extremely annoying.
- In addition, Kyle often says "she's crazy," when Candace acts rude towards him.
- Candace also expresses irritation towards Kyle Larman, the Fireside Girl manager, because of his shyness. Candace doesn't really focus on busting him, but still gets annoyed with him occassionally.
- Candace will make her first FT Squad guest appearance in The FT Squad Goes to Jurassic Park.