Irma Langinstein is friend of the Teenage Mutant Ninja Turtles, Master Splinter, and mainly April O'Neil (as well as her co-worker).
Comic books
In Archie Comics and Mutant Turtles Gaiden, Irma works as a news reporters in Channel 6.
Animated Cartoons
In the 1987 Animated Series Irma works as secretary in Channel 6 and is also a friend of April and the Turtles. Unfortunately in the 2012 Animated Series, although she appears to be a high school student and good April's partner, she holds the villainess paper because she results be Kraang Subprime , Kraang Prime 's right hand. And she has been sold to Earth to spying on April in order to discover human weaknesses and destroy humans to replace them.
Gallery
Irma in Archie Comics
Irma in Mutant Turtles Gaiden
Irma in the 2012 cartoon
Irma as Kraang Subprime