Kraang Subprime was formerly a spy on Earth, disguised as a human schoolgirl named Irma and becoming April O'Neil's best friend until discovering the location of the turtles' lair.
This version of Kraang Subprime is branched off from his version in the 2012 TV series. His history before the events of Amazing Adventures is the same as that of his animated version.
In the 2012 TV series, Kraang Subprime has since had his true named revealed as "Knight". As that series and Amazing Adventures no longer strictly share continuity, it is not known if the character in Amazing Adventures shares this name, just as it is not known if the real name of that series' Little Girl is Chloe as she was named in Amazing Adventures.