What Happened To Everyone Who Used Cerebro?
6. Rachel Summers
Nathan Summers is the offspring of a version of Jean Grey and Scott Summers, but he isn't the only one. In an alternate future, the couple had another child who is the half-sister of Cable named Rachel Summers.
Because she picked up most of her mother's genes, Rachel has grown into a powerful telepath capable of much of the same things as Jean. She has psychic powers revolving around empathic abilities, telepathy, telekinesis, and astral projection. She has also been the host to the Phoenix Force and even used her mother's former aliases, Phoenix and Marvel Girl at various times.
Rachel's telepathic abilities are considered to be virtually unlimited in that she can send and receive psychic information anywhere. She has been shown to manipulate the cognitive processes of other people, which effectively gives her the power to control other people's minds, but she can also suppress superpowers, swap people's minds from their bodies, and even edit the memories of others.
Unsurprisingly, Rachel Summers has used Cerebro on several occasions. Because her powers stem from those of her mother's, she has been able to use the system multiple times without fear of feedback knocking her down.