It would be fun if she was chasing the turtles, or one of them.
I'd love to see Irma scaring (let's say the tough Raph), and every time Irma shows up and asks "April? where is Raphael???" you can see Raph (who usually fears nothing - except cockroaches) turning pale and trying to find a place to hide.
A stalker Irma would be fun
