Susan Storm, also known as the Invisible Woman, is a founding member of the Fantastic Four. She gained her powers after being exposed to cosmic rays during a space mission. Her abilities include becoming invisible at will and generating powerful force fields. Susan is often portrayed as the emotional and moral anchor of the Fantastic Four, balancing her roles as a superhero and a caring sister to Johnny Storm, the Human Torch. Her character demonstrates strength, intelligence, and compassion, often leading the team with her strategic thinking and diplomatic skills.