Sharon Ventura
Sharon Ventura was a former pro-wrestler who fell in love with the Thing
and subsequently joined the Fantastic Four as Ms. Marvel.

During an adventure in space, she was exposed to Cosmic Rays which mutated her body into a rock-like form similar to that of the Thing.

Origin
Brought up by her strict father, Sharon Ventura constantly sought ways to gain his approval
including joining military school, but she constantly failed to live up to his super-high standards.

Even after he died, she continued to pursue dangerous activities to somehow prove herself to him beyond the grave.

Creation
Sharon Ventura is a Marvel character and made her first appearance in The Thing #27 Sep 1985, and was created by Mike Carlin and Ron Wilson.
Her first appearance as Ms. Marvel was in The Thing #35 May 1986