Sure! Here's the requested content in spun format with synonyms:
Cathy Philip and also Foster.
Cassandra has deep affection for Phineas, and also Ferb.
Phineas captures the love of Cathy, and Foster.
Cara takes delight in being with Fred and Ferb.
Fred has a special place in the heart of Candy, and Felix.
Candy has a deep connection with both Phineas and Foster.
I hope you find these variations helpful!