Who is turtle paired up with?

In the popular animated series "Teenage Mutant Ninja Turtles," each turtle has unique characteristics and personalities, but they are not typically "paired up" in romantic relationships. However, Leonardo, Michelangelo, Donatello, and Raphael work together as a team and often have strong bonds with characters like April O'Neil and Splinter. If you meant a specific episode or storyline, please clarify!