X-Treme Genes: Umbriel by Stardustrobin

Phyllis "Umbriel" DeFarge had her genes "unlocked" when she and four other college students discovered a nest of hibernating aliens sleeping inside one of the Egyptian pyramids. She gained the power to mentally control earth and rock, which fit well with her grounded, sarcastic personality.

Phyllis is a gay transwoman who has not yet made the choice to physically transition as she's still in the process of figuring herself out.