She possesses a bulky body that is colored varying icy shades of blue. The creature also possesses two, very large arms with four spiky fingers each and two short legs. Her head is carved into five sharp protrusions. She has two dark, hexagonal eyes and a gaping, dark mouth lined with sharp teeth. This monster is slightly taller than Garnet.
Despite this, however, when she is uncorrupted, she is quite small in size.
The Crystal Gems are shown fighting the Ice Monster in the large cavern inside a snowy mountain. She's shown to be preventing them from acquiring a powerful, elemental artifact called the Shooting Star. After her arm falls off, Garnet deals the final blow on her, thus, defeating the monster. Pearl bubbles her gem and transports it back to the Burning Room. Her gem is seen again when Garnet bubblesSteven to the Burning Room and is later seen again when Steven bubbles the Centipeetle Mother's gemstone to the room along with the "Chaaaaps".
She has an elongated, hexagonal gemstone colored a bright blue which is embedded deep within her forehead. The gemstone is also damaged, with a part of it missing. Her gemstone glows brightly while in her body. When she was healed, the chip in her gem is repaired.