Phineas Flynn: Phineas Flynn is step Brothers with Ferb Fletcher. Phineas and Ferb spend their 104 days of Summer building stuff in their backyard. 
Ferb Fletcher: Ferb very rarely speaks, but is not actually shallow as others would assume. He is very courageous and has the ability to think quickly and stay calm in the midst of desperate scenarios. A notable skill of his is a technical and technological proficiency he shares with his stepbrother which he can easily take advantage of and build almost anything he chooses to.
Candace Flynn: Gertrude Flynn is a main character of the Disney Channel animated television series Phineas and Ferb, voiced by Ashley Tisdale and created and designed by Dan Povenmire. She first appeared in the series’ pilot episode along with the other main characters who star in the A-Plot.
Perry the Platypus: Perry is the pet platypus of the Flynn-Fletcher family, and is perceived as mindless and domesticated. In secret, however, he lives a double life as a member of an all-animal espionage organization referred to as O.W.C.A.. Many secret entrances to his underground lair exist all around the house; such as the side of the house, most notably the tree that his owners sit under in the backyard, and several other everyday objects that seem to elude the family’s attention. Perry also has entrances in Hawaii and North Dakota. He engages in daily battles with Dr. Heinz Doofenshmirtz, an evil scientist who desires to take over the Tri-state area with obscure contraptions that work perfectly according to his intended function but fail in his application of them every time.
Dr. Heinz Doofenshmirtz: Dr. Heinz Doofenshmirtz is a mad scientist who heads his own corporation, Doofenshmirtz Evil Incorporated. He takes pleasure in attempting to wreak havoc on citizens of the Tri-State Area. With the exception of one episode, Heinz always has unusual contraptions on-hand. Also in every episode, his nemesis Perry the Platypus, foils his plans. It is unknown if Heinz knows the Flynn-Fletchers personally but his other family members have met them.
Linda Flynn Fletcher: is the mother of Phineas and Candace Flynn, and the stepmother of Ferb Fletcher. She’s the daughter of Betty Jo Flynn and Clyde Flynn. She is married to Lawrence Fletcher. She is a regular American mother although she used to be a one hit-wonder named Lindana, and now plays in a free form jazz band with Isabella’s mother and Jeremy’s mother. Her anniversary with Lawrence Fletcher is June 15th.
Phineas and Ferb 