Knight (2012 TV series)

Irma was a student at Roosevelt High School and April O'Neil's best friend for an entire year during season 2. In The Invasion, Part 1, she is secretly revealed to be the master Kraang spy, Kraang Subprime.

Irma
She dresses in a gothic style of clothing. She has black hair, which is cut short and has purple streaks. She wears bracelets on both of her wrists, a black tank top with a checkered pattern skirt, large boots that go up her calves and red oval-shaped glasses. She is slightly shorter than April.

Kraang Subprime
He has a left cyberoptic eyepiece a prosthetic claw in his front left tentacle, a scar across his face and a blue tatoo around his right eye.

His exosuit is much taller and wider than his brethren, and retains vestiges of Irma's "body", such as her head and arms. The head can detach and grow spider-like legs.

History
Mousers Attack!: Irma made a cameo on April's caller ID prior to her first in-person appearance.

Mutagen Man Unleashed: Irma makes her first in person appearance here, she is shown at her locker but her face cannot be seen and she has no speaking role.

The Good, The Bad and Casey Jones: Irma makes her first speaking appearance in this episode. She is shown as April's best friend, walking with her in the hall. She asks Casey where he got his bruises, and doesn't seem to like April hanging around him.

Of Rats and Men Irma played a larger role in this episode. She was kidnapped and put into a cage along side Casey Jones. The Rat King wanted to test the mutagen on her first to create his army.

Pizza Face Irma appears hanging out with April, about to see a zombie movie when her friend get a call from her T-Phone. She didn't believe the "dating with Casey" excuse, and she already knew that April has some secret friends that she don't tell about. They both get hit by a pizza guy's bike, who exclaimed that he's being attacked. He leaves a pizza box, which April get it for the guys and run off. It appeared to make Irma feel bad because her friend ditched her again with no honest reason.

The Wrath of Tiger Claw Irma is hanging out with April and Casey (who complains about her being a third wheel and it being a ruined date) after seeing a movie. April then senses Tiger Claw and Karai who are following them. April (who is being chased by Karai) and Casey (who gets ambushed by Tiger Claw) split up to deal with them leaving Irma confused and frustrated with the both of them and unaware of the situation.

A Chinatown Ghost Story Irma and April are captured by Ho Chan because he needed April's powers. He also says Irma has powers, but he doesn't know what they are.

The Invasion, Part 1 After being ambushed by Foot-Bots, a panicked April takes Irma to the Turtles' Lair, believing that her best friend is trustworthy enough to keep Splinter and the Turtles' secret. There, Irma's body begins to split apart and reveals to be the specialized Kraangdroid body of Kraang Subprime, the Kraang second-in-command and a master spy who had masqueraded as "Irma" to spy on April. He says that the discovery of the Turtles' lair was what the Kraang needed to start the invasion of Earth, and he immediately opens multiple portals, allowing other Kraang directly into the lair. The living room and Shellraiser are destroyed during the scuffle, and the Turtles and April are forced to retreat while Splinter holds off the Kraang assault. Kraang Subprime is defeated, and apparently killed, when a piece of the burning lair falls on top of his unsuited body, his tentacles writhing and going limp.

Trivia

 * As a Kraang spy, "Irma" was far more convincing than human-camouflaged Kraangdroids or the unmanned Kraangdroids disguised as women from the "Human Genome Project". Irma possesses none of the Kraang's grammar tics, and had more organically human mannerisms than an android.  When Kraang Subprime revealed his true identity, his speech continued to have the same natural grammatical constructs, not typically heard from other speaking Kraang.
 * April and Irma are both Kraang living as humans, though under very different circumstances. April is a half-Kraang mutant, which she had only recently discovered during the events of The Kraang Conspiracy; other than this, April's outward human appearance is how she really looks and is not a disguise.  But Irma is the Kraang spy, Kraang Subprime, disguised as a human inside a special Kraangdroid suit, and he almost certainly knew all along that April was part-Kraang.