The goal was to duplicate the abilities of what at the time were a legendary tribe of ice-people; the experiment was a success, though as a side-effect, Sigrid's skin permanently turned blue.

This did not affect the Global Guardians, however, who worked outside of the U.S. During this time, what Sylvester Pemberton referred to as the "Great Super-Hero Scare"[4] Doctor Mist sent Icemaiden, along with Rising Sun, the Tasmanian Devil, and the Green Flame to Canada to run security for the international Trade Conference.

This resulted in them traveling to Greenland with Jade and the new Icicle on a mission to find and free Solomon Grundy.

[5] Upon the discovery of a real tribe of ice-people, their princess Tora Olafsdotter (Ice) joined the Global Guardians.

Years later, after Ice had left the Global Guardians, joined the Justice League International, and was killed by the Overmaster, Sigrid re-emerged.

[8] Later recovered, Sigrid resumed their superhero career and is assumed to have eventually joined an unofficial branch of Justice League Europe.

[9] After the "Infinite Crisis" storyline, it was revealed that Icemaiden had at some point been abducted by the supervillain Warp, a capture paid for by a mysterious "organ-napper" who turned out to be former film actress Delores Winters.

In the "Infinite Frontier" relaunch, Sigrid appears in the 2021 holiday special Tis the Season to Be Freezin' in Andrew Wheeler and Meghan Hetrick's story "Break the Ice" and takes the code name Glacier.

They were flirtatious with Nuklon during their time together in the JLA, and later became involved with Olivia Reynolds, the ex-girlfriend of Hal Jordan.