Empress of Light (aka Mei-Lai-Gong): Shanji Trilogy, 2

In this sequel to Shanji, Yesui is Mei-lai-gong, the empress of light, born with the ability to move both light and mass in and out of the place of creation called the gong-shi-jie. Her brother Mengjai, seemingly normal at birth, conceals a power Yesui has not imagined. Together they discover there is more to the gong-shi-jie than just colorful mists of creative light. Working to save a dying planet, they learn that love can be found in strange places, that in an infinite universe, no matter how many powers you have, there is always someone more powerful, and death is not an ending, but a change...