The characters that make up the Fantastic Four are Mr. Fantastic, the Human Torch, Thing and Invisible Woman. All four of these characters were average humans who underwent exposure to cosmic rays that changed the properties of their bodies.
The names of the people who became the Fantastic Four are Reed Richards (Mr. Fantastic), Susan Storm (the Invisible Woman), Ben Grimm (Thing) and Johnny Storm (the Human Torch). Taken together, this group of heroes is known as the First Family within the pantheon of Marvel characters. Diablo, Abraxas, Doctor Sun and Admiral Votan are just some of the many enemies the Fantastic Four have faced.