Some TMNT stuff really isn't for little kids.
She was sent to T.C.R.I.'s building to retrieve sensitive information, while being tracked by Agent Bishop and his forces. She killed several security guards prior to encountering the Ninja Turtles, nearly evading them and being knocked out a window by Raphael.
With the building surrounded by Darkwater mercenaries, Zodi offers a temporary alliance to the Turtles, arguing that they can all escape alive if they work together. She later distracted April by claiming to have killed Leonardo and taken his swords, only to be pursued by the Turtle himself. She was physically restrained by Darkwater, but rescued by Michelangelo shortly thereafter.
She antagonized Raphael further by suggesting that their mistakes would lead to one of them being killed, touching on a fear that had been building in him. He punched her into the hallway, then untied her so that he could beat her physically, until the other Turtles intervened to stop him.
Though still allied to the Turtles in their mutual need to escape Bishop and Darkwater, Zodi soon showed that she was only out for herself, using Michelangelo as a body shield and declaring that she would have killed them if it would have facilitated her escape. She left with Madame Null after the retreat of Bishop and Dark Water.
She encountered Raphael again when he and Alopex infiltrated a Null facility, as she had been stealing pets in order to create more mutants. She found them after they had clashed with a homunculus and a fight broke out between them.
Alopex attempted to reason with the mutant scorpion by revealing her own history as someone else's weapon, but Zodi merely laughed and declared that she liked being part of the Null Group. She then stalled the two other mutants long enough for a snake mutant named Krisa to appear behind them. Zodi tried to kill Raphael in the ensuing fight, but Krisa unexpectedly rebelled and constricted her body around the scorpion mutant, allowing Alopex and Raphael to escape with the pets.
When confronted by Madame Null, Zodi lied to cover Krisa's actions, taking full responsibility for the invasion.