Donatello

Don is commonly known as the "brains" of the turtles. His endeavors span far, including planning, inventing, being the team doctor, and generally being a "Mr. Fix It." He is possibly the quietest of the group (if that can actually be said of any of the turtles), although a chance for a good jibe is often impossible for him to turn up. Yet for all his quiet introspection, he seems to care more about his brothers feelings, and others, than the rest of the group. Don rarely has a harsh word to say to anyone, and is quick to comfort those who are in distress.

This is MY Don, basically a compilation of all the Dons. For the different Donatellos, from each medium, check out these:

Mirage Don

Movie Don

Cartoon Don

Archie Don

Image Don