Magic shit. Tru has the pieces of the shattered Staff of One at her disposal. Because the Staff is broken and was more connected with her mother, she can't absorb it into her body. As an adult, she had the pieces turned into Wonder Woman-esque gauntlets. She's had enough practice with her magic to cast the same spell more than once, though she does need to shed blood to activate her powers.
Age:
29
Story:
Never met her parents. The Runaways were attacked while Nico was pregnant. Chase was killed, and the others brought Nico to the hospital. Gertrude was born almost two months prematurely while her mother died, and with both parents dead and the closest family friends being homeless adventurers and all, she was kept in the hospital until one of the X-Men, Karma, volunteered to adopt her.
Within a few years, Karma was largely retired from the X-Men and Xavier's, opting instead to live in NYC with her partner, Lucy Kane. When Xi'an and Lucy broke up when Tru was ten, Xi'an went back to Xavier's and Lucy stayed in the city, getting together with Felicia Hardy two years later. Tru was an overachiever in school, but somewhere around college she started slipping. Following in her deceased parents' footsteps as superheroes (though not as a homeless hippie, thankfully), Tru ended up devoting most of her time to being Thirteen and letting her personal life go to shit. She's been fired from a few jobs and now she's a paper pusher and coffee fetcher for SuperBuzz! thanks to Felicity, which she's also bad at. Sorry, Felicity.