- Jean is a founding member of the X-Men.
- Professor X has stated that Jean walks the line between Omega Level Mutant and Omnipotent.
- She is the most powerful mutant to ever live, even more powerful than Professor X or Apocalypse.
- When she was a child Professor X put mental blocks on her powers, limiting her to a Level five, but as she got older the barriers began to fade.
- Jean had two younger brothers. She had three but her youngest died of a heart attack when he was six.
- Jean is an expert at keeping her anger and sadness hidden, and then channeling it onto the villain during fights.