¿Who is stronger, Fallen One or Jean Grey?

The Fallen One is a powerful and mysterious cosmic entity from the Marvel Comics universe. It is an ancient being of immense power and possesses a wide range of superhuman abilities, including super strength, super speed, energy projection, and the ability to manipulate reality. The origins and true nature of the Fallen One are shrouded in mystery, and little is known about its past or motivations. It is believed to be one of the oldest known entities in the universe, and has been worshipped by many civilizations throughout history as a deity. Despite its god-like powers, the Fallen One has often clashed with the superhero team the Fantastic Four and other cosmic entities in its quest for power and domination. It is a formidable and dangerous foe, and has proven to be a constant threat to the safety of the universe.

Jean Grey is a comic book character created by Marvel Comics and is known to be one of the publisher's most powerful and beloved heroes. She is a mutant who has developed the ability to control and manipulate telepathy and telekinesis. Jean Grey was first introduced in the comic book "X-Men", where it was revealed that she had been one of the founding members of the team of mutants led by Professor X. Although she initially acted as a hero, Jean Grey faced many obstacles and ethical dilemmas throughout her career and had to make difficult decisions to protect humanity.