Fish guard (IDW)

In the IDW continuity, the fish guard is a mutant fish who exists in a possible future that the Turtles visited. She was delighted to see real ninjas, as she had wanted to be a ninja all her life, but was dismayed when Donatello suggested she fight back against "the master."

When Donatello freed the leaders of the resistance, the fish guard shot her superior to save him, saying that she had always dreamed of fighting back. She fled with the older Donatello, and took shelter with the rebellion in the Turtles' old lair.