Empress Glacius is the ruler of planet Freezeonia. While she serves a primarily minor role in the story. She still gets a fair bit of time. She and Cassini have a bonding similar to Twilight Sparkle and Princess Celestia.

Anyways as for her voice she sounds primarily like Star Catcher from the G3 My Little Pony series except with a Russian accent. One important thing to remember though is that she speaks Proper English instead of Broken English ("This is the problem isn't it?" instead of "It is problem no?") and she also tends to make puns and jokes involving ice, snow or anything to do with coldness.