This is how I think Irma is useful.

[TurtleTitan97]

Originally Posted by MaximeLoonatic

But she was planned to be human in the first place, and Ciro and Auman hinted that they might bring her back

Ciro also said we'd get the story of how Raph got that crack on his plastron. What's your point?

And when the heck was it ever stated Irma was originally planned to be human in this show???