Characters created for the original comic book incarnation of the turtles who never made it to the adaptations. For tropes relating to characters who also appeared elsewhere, please visit the franchise character page. Note: While all the characters here are technically adapted out, please note it only if the story they appear in was adapted without them in it.
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The daughter of Casey Jones' first wife, who was raised collectively by Casey, April, Splinter and the Turtles after her death.
Casey Jones' first wife and Shadow's biological mother.
Radical's archenemy, a demon-looking human with the ability to take on aspects of his surroundings.
A leech who mutated and gained sentience after it got a taste of Raphael's blood. Its continuous feeding on him caused Raphael to de-evolve back to a normal turtle, which forced his brothers to chase after the culprit.
The Foot Clan
Oroku Saki's older brother, and the third leg of the Love Triangle involving Tang Shen and Hamato Yoshi.
One of Karai's lieutenants, with a particular hate-on for Leonardo.
Member of a splinter faction of The Foot, who goes undercover as a police officer and later serves as liaison with other crime groups.
A scientist who regularly puts his life on the line FOR SCIENCE!!
Oroku Saki's daughter, who serves as the Dragon Lord Komodo's right hand.