Transonic

Laurie Tromette was always told she was incredibly bright and excelled in academics. Her mother wanted her to become a doctor, but she was too scared of hospitals. She once got in trouble, while in high school: Her friend Melanie got her to hang out with some "cool kids" who were racing cars. Trying to fit in, Laurie raced as well but lost control, and Melanie was wounded, barely surviving. Laurie lost both her friendship with her, and the trust of her parents.

After graduation, Laurie moved to Vancouver, Canada, to attend college. At nineteen years old, without warning, her X-Gene activated, and her body started undergoing a painful change. Her hair started falling out, her bones hurt, and her skin became hard, blue, and cold. She hid herself away, and spent days in a confused panic.

She was located by the X-Men using Cerebra. The X-Men sent Iceman and Angel to watch over her from afar. Finally, the pain became too great, and Laurie decided to kill herself by jumping off a tall building. The X-Men arrived on the scene, along with Hope Summers, who was returning from her trip to Alaska to discover her roots. Laurie threw herself off the roof, and Hope jumped after her, grabbing her in midair. Once in physical contact with Hope, Laurie's mutation completed itself. She manifested blue skin, facial markings, and the power of flight. Also, the clothes she wore mysteriously disappeared. She felt instantly better, like a brand new person. She committed herself to following Hope Summers wherever she went, turning her back on her normal life.

While Sentinels were unleashed over the world, Laurie decided to go the opening of the Museum of Mutant History with Idie, as she thought she had to learn more about the mutant culture. The Hellfire Club attacked the opening and Idie and Laurie sought to defend the attenders.

Laurie became a citizen of Krakoa and was shown hanging out with other mutants at the Green Lagoon.