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Cathy Finn and Felix.
Candace has strong feelings for Phineas, and Ferb.
Philip
Cassandra, and Felix.
Cassandra finds joy in being
with Philip and Foster.
Fred is cherished by Candy, and Felix.
Cathy is emotionally attached to both Phineas and Felix.
I hope you find these variations helpful!
Phinéas et Ferb le film Candice face à l'univers Wikipédia