Darth Vader
Cause he's the main villain, or in literary terms, the main antagonist.
Star Wars IV - A New Hope
The full title is Star Wars IV: A New Hope or Star Wars Episode IV: A New Hope, but when the movie first came out in American theatres, it was just called Star Wars.
Denebia (in the Star Wars galaxy). Deneb IV.
Star Wars IV
Star Wars IV: A New Hope was released on May 25, 1977; which was a Wednesday.At the time it was marketed simply as Star Wars.
It can be referenced a number of ways, "Star Wars", "A New Hope", "Episode IV" or "Star Wars Episode IV: A New Hope"
Star Wars Episode IV : A New Hope
4 was made first
Star Wars Episode IV: A New Hope debuted May 25, 1977 .
It was made in 1977.
Yoda did not appear in the original Star Wars, A New Hope.