A figure wearing a hood in a dream will always appear to be slightly menacing. While not necessarily being evil, there may be a part of us that has been threatened.
The hood can also represent that part of ourselves that, if withdrawn, is creating a problem.
An aspect of our personality may be invisible to us and may need to be uncovered in order for us to function in an acceptable fashion. Consult the entries for hat in clothes, monk and veil for further information.