Fifi is a camera operator working for Bust 'Em ("Leave the Busting to Us!"). She has apparently become a substitute teacher. She appeared in a car with a man throwing laundry at Heinz Doofenshmirtz's laundry basket ("Swiss Family Phineas)". She was seen jumping into the pool with a girl ("Phineas and Ferb Hawaiian Vacation").
- "The Fast and the Ferbulous: Danville Drift" (Cameo)
- "Leave the Busting to Us!"
- "Swiss Family Phineas" (Cameo)
- "I Was a Middle Aged Robot" (Cameo)
- "Hip Hip Parade" (Cameo)
- "Phineas and Ferb Hawaiian Vacation Part I" (Cameo)
- "Phineas and Ferb Summer Belongs to You!" (Cameo)
- "Love at First Byte"
- "Just Our Luck" (Cameo)