Who says I dreamt to-night that I did feast with Caesar,

And things unlucky charge my fantasy;

I have no will to wander forth of doors,

Yet something leads me forth.

Cinna the Poet.

Explanation:

In Act 3, Scene 3 of the play "Julius Caesar" Cinna the poet enters the stage and says that he had a dream of feasting with Caesar.

The Act is important as in this act plebeians kills the wrong person. One of the conspirators of Caesar's assassination was Cinna. But the plebeians mistaken Cinna the poet to be Cinna the conspirator kills him.

This act of plebeians reveals that though the conspirators had killed Caesar's body but they could not kill Caesar from the thoughts of the citizens of Rome.

So, the correct answer is Cinna the poet.