A news reporter for channel 6, she often gets captured by criminals for recklessly attempting to catch them on camera. She knows a little self defense. She is a voluptuous woman known for her model like physique and yellow mechanic jumpsuit with autumn chestnut medium hair. Friends with teenage mutant ninja turtles that she considers brothers and romantically interested in Casey Jones.

Irma is the bespectacled, dorky best friend and colleague of April O'Neil at Channel 6, where she serves as Burne Thompson's secretary. Irma is usually dressed in a light blue turtleneck sweater, a long, light purple skirt, white leggings, and light brown loafers. She wears large-lensed eyeglasses with bright pink frames. She has her hair tied in a high ponytail with a white scrunchie holding part of it in place. Like April, Irma is one of the few humans who accept the Turtles rather than seeing them as evil simply because they are different from humans. She is klutzy, tending to step on a person's foot whenever she gets upsetIrma is constantly on the hunt for a boyfriend, even showing affection to the Shredder in one episode (though she believed it was a man in a Shredder costume at the Mardi Gras costume parade), and once exhibiting excitement when she thought Donatello was attracted to her.