Past and Present life
She was expecting her second child to be a girl and made dresses for several months in preparation for this, but the child turned out to be a boy (Roger). She made Heinz wear the clothes for a year because she had run out of material ("Gaming the System").
Her "love was always inexplicably linked to kickball," and Roger was an expert from the start, therefore earning her love. Heinz, however, did not share the "feet coordination". Instead, he was very coordinated with his hands. His mother did not care, however, so Heinz did not get to enjoy his mother's love ("Thaddeus and Thor").
According to Heinz, Roger is her favorite of her two children ("Tree to Get Ready").
She never let Heinz swim in public pools ("De Plane! De Plane!").
Her family was living happily, but one day their garden gnome was repossessed, so they dressed Heinz as a garden gnome and did not let Heinz do anything, not even eat or wave to the neighbor ("Lawn Gnome Beach Party of Terror").
Heinz never had a good relationship with his mother as a child and was envious of his Goody-Two-Shoes brother, Roger, who stole all their mother's attention away from him, leaving Heinz lonely. While growing up, Heinz developed evil plans to seek revenge on his brother so he could finally win his mother's heart once and for all.
She seems to want Roger and Heinz to spend a little more quality time with each other ("She's the Mayor").
- It is never explained how she gave birth to Heinz Doofenshmirtz, as she was allegedly not there on the day of his birth ("Raging Bully").
- She is quite strong as she can lift Roger, a fully grown man ("Thaddeus and Thor").
- Heinz mentions that she currently lives in a "singles hotel" in Danville and owns a plasma TV ("The Chronicles of Meap" character commentary).
- Her husband is alive. They possibly don't live together, because, Mrs. Doofenshmirtz has been shown living in the U.S. ("Thaddeus and Thor"), while her husband still lives in Heinz' childhood home in Drusselstein ("Father's Day").
- Her son, Heinz Doofenshmirtz, has a similar nose to her.
- "Lawn Gnome Beach Party of Terror" (First appearance) (Appears in flashback(s))
- "Gaming the System" (Appears in flashback(s))
- "Thaddeus and Thor"
- "De Plane! De Plane!" (Appears in flashback(s))
- "At the Car Wash" (Appears in flashback(s))
- "Phineas and Ferb Christmas Vacation!" (Pictured only)
- "Split Personality" (Appears in flashback(s))
- "Make Play" (Appears in flashback(s))
- "Rollercoaster: The Musical!" (Appears in flashback(s))
- "Meatloaf Surprise" (Pictured only)
- "My Sweet Ride" (Appears in flashback(s))
- "This Is Your Backstory"
- "Der Kinderlumper" (Appears in flashback(s))