Dr. Hirano

 is Stacy's mother. She removed Isabella's tonsils. ("I Scream, You Scream") Dr. Hirano was first mentioned (and spoken of) when Stacy decided to tell Candace that she was getting her ears pierced.

Stacy Hirano
Dr. Hirano is Stacy's mother. On Phineas and Ferb's Parents' Anniversary, they are only seen chatting on the phone ("Dude, We're Getting the Band Back Together"). She also seems to think that her daughter is not very smart, due to Stacy frequently asking Candace to call her mom "and tell her that" when Candace refers to Stacy as a genius. ("Let's Take a Quiz"; "Don't Even Blink")

Candace Flynn
Dr. Hirano thinks Candace is flighty and unfocused because she rather bust her brothers than doing what she and Stacy are doing. However, she seems to think of her differently after seeing how determined she is to bust her brothers. ("Robot Rodeo"). She is also referred to Mrs. Hirano by her.

Linda Flynn
Dr. Hirano seems to be friends with Linda, but they only appeared together once. Before Candace and Stacy got in the house, they were talking about how Dr. Hirano's mom had never let her go to a concert when she was a kid ("Robot Rodeo").

Appearances

 * "I, Brobot"
 * "I Scream, You Scream"
 * "Dude, We're Getting the Band Back Together"
 * "Does This Duckbill Make Me Look Fat?"
 * "Don't Even Blink"
 * "Let's Take a Quiz"
 * "Robot Rodeo"