Teenage Mutant Ninja Turtles 2012 Karai returns to the turtles and splinter

There are some reasons that the people need to sign this. In Teenage Mutant Ninja Turtles of 2012, we did not expect that Karai was mutated into a three-headed serpent in a special way. We realized that she is immune to retromutagen and she belongs with the turtles and splinter. When the turtles returned, we thought she was gonna be cured, but there can only be a special cure. Karai did not disserved to be a mutant, because of what the shredder have done.
If you can give the time a chance, everybody can be happy of a family reunion. It is not fair for shredder to treat her of what he done, like stolen her from splinter, lie to her, mutate her.