This site being mostly about super-heroes, I think it would be best to close out Ninja Week with a look at ninjas in one of our most popular topics, comic books. Ninjas have been a major part of comic culture since the ninja craze of the eighties.
DC on the other hand would remain relatively ninja free. With the exception of the ninja-like Shadowdragon, DC has avoided ninja in just about all forms. Certain characters, like Lady Shiva and Cassandra Cain (Batgirl III) seem quite ninja like without ever being mentioned as such. And of course, Batman Begins gives us Bruce as a ninja.
In recent times, ninja have often become more of a joke, popularized by the internet meme pirates vs. ninja. Antarctic Press, publishers of Ninja High School even created a series about that fight, called... Pirates vs. Ninjas. Adam Warren’s Ninjette is slightly (ok, very slightly) more serious than most, but otherwise funny ninja are often all you can find. Humor web comics like White Ninja, No Need For Bushido, and the ninja doctor named Dr. McNinja. While all fun, this reviewer would appreciate some more serious ninja fare outside of new issues of G.I. Joe.