I used the torso, legs and arms of a Jean Grey figure, plus the chest of Firestar, the feet of a MCU Valkyrie feet, one head from the Dark Phoenix pack and the hair of a Black Queen.

I painted the chest and feet with a shade of yellow as close as possible to the base of Jean's uniform and changed the blue color of the details.
I gave the shoes a touch of gold and repainted the eyebrows, eye shadow, and hair.