This article's title is conjectural and may be subject to change as new information becomes available.
In the IDW continuity, an unnamed fish guard woman is a mutant who exists in a possible future that the Turtles visited in the Turtles in Time miniseries. She was delighted to see real ninjas, as she had wanted to be a ninja all her life, but this was not possible as "the master" decreed she should be a guard instead. The woman was dismayed when Donatello suggested she defy her master and decide to be something else, telling him it was unwise to speak openly about such things.
When Donatello freed the leaders of the resistance, the fish guard shot her superior officer to save him, saying that she had always dreamed of fighting back. She and some other defecting guards fled with the older Donatello, and took shelter with the rebellion in the Turtles' old lair where the older Donatello had been hiding.