What are some of the most popular demon comic book characters in Marvel Comics?

Marvel Comics features several iconic demon characters. Some of the most popular include Mephisto, a powerful demon lord who often acts as a trickster and deals in deals with souls. Blade, a Daywalker, is a dhampir who hunts vampires and demons, making him a significant figure. Belphagor is another significant demon, known for his cunning and ability to manipulate situations. Dormammu, while not strictly a 'demon' in the traditional sense, is a powerful entity from the Dark Dimension often associated with demonic forces and possessing a demonic aesthetic.