Fantastic Four.

The Surfer's real name is Norrin Radd. He hails from the highly advanced planet Zenn-La. He was an astronomer and valued peace and knowledge. When his home planet was threatened with destruction by Galactus, a cosmic being who devours worlds, Norrin made a deal: he became Galactus's herald, finding suitable planets for him, and in exchange, Galactus spared Zenn-La and Norrin's lover, Shallu-Bal.
Thus, Norrin became the Silver Surfer: his body became covered in a silvery substance, he gained immense cosmic power, and also a board on which he could fly faster than light.
He is a minor character who, in the second part of F4, sacrificed himself to kill Galactus and save the Earth.

Mole Man is a scientist who controls underground monsters. He is a minor character who helps the heroes.

Galactus is a cosmic being who devours planets. He is also a minor character.

Doctor Doom (Victor von Doom) is the ruler of Latveria, a brilliant scientist and sorcerer, and Reed's sworn enemy. He is a minor character and does not currently appear.

Alicia Masters is a blind sculptor, first the lover and then the wife of Ben Grimm.

Franklin Richards is Reed and Sue's son and has the ability to bend reality and psionic powers, but he is only one year old.

Benjamin (Ben) Grimm is the Thing. Reed's best friend and a skilled pilot. After a space mission, his body mutated: his skin became covered in a hard, rock-like mass, and he gained immense superhuman strength. Despite his rough exterior, Ben is a kind and loyal man. His signature phrase is "Time to smash!" At one point, he even considered trying to regain his human form, especially after meeting the blind sculptor Alicia Masters.

Jonathan (Johnny) Storm is the Human Torch. Sue's younger brother. He can cover his body in flames, fly (by propelling himself with his own flames), absorb fire without harm, and manipulate it. Johnny is impulsive, a risk-taker, and often serves as a comic relief, but in critical moments, he displays true heroism. His catchphrase is "Fire!"

Susan (Sue) Storm is the Invisible Woman (sometimes called "Invisible Woman"). She is Reed's lover and later wife. She can manipulate light waves to become invisible and also create powerful force fields of psionic energy (for both defense and attack). Over time, her powers have evolved, and she has become one of the most powerful members of the team.

Reed Richards is Mister Fantastic. The team's leader and a brilliant scientist. After the crew of a spaceship was exposed to cosmic rays, Reed gained the ability to stretch and compress his body into various shapes. He often takes responsibility for the team's failures.