Sure! Here's the requested content in spun format with synonyms:
Cassandra Fred and also Foster.
Candace Finn, and also Felix.
Phineas Candace, and also Foster.
Candy being with Fred and Frank.
Fred has a special place in the heart of Cathy, and Felix.
Candy is emotionally attached to both Phineas and Ferb.
I hope you find these variations helpful!
