Also known as Iblis
. Satan is responsible for not respecting mankind as a creation
, and was thus cast out from Heaven
, and given the task of trying to tempt mankind away from the right
and the good
. His main way of doing this is pride
, which is ironic since it was his own pride that caused him not to respect man, and thus caused him to be cast out.
At the end of time Satan is to be punished for all the evil he has caused, and even though he is a supernatural being his powers over people are limited to those who willingly assent to him. As such most muslims believe that when they worship and live an Islamic way of life, they are immune to Satan. They may even be right. Time will tell.