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Candace is crazy about Phineas and also Felix.
Cathy has deep affection for Phineas, and also Foster.
Fred holds a special place in the heart of Cathy, and Foster.
Candy finds joy in being with Fred and Frank.
Fred is cherished by Cassandra, and also Felix.
Cathy is emotionally attached to both Finn and Frank.
I hope you find these variations helpful!
Phineas and Ferb The Movie Candace Against The Universe