An Ice Cannon, fittingly, is shaped like a small cannon. Its body is light blue with white highlights and black rivets. It has four short, sharp, turquoise legs, a large, turquoise spike on either of its sides, and a black base. The Heartless's face is a black sphere with glowing yellow eyes set in the front of the cannon's body. The actual barrel of the cannon is blue and has several light blue designs that cause it to resemble a face, with the mouth of the cannon being the nose. It also sports a short, curled, yellow fuse in its back.
The Ice Cannon's name clearly references its manipulation of ice, as well as the weapon it is based on.
The Ice Cannon is immune to Blizzard, but is vulnerable to Thunder, Aero, and Fire. As for status effects, the Ice Cannon is vulnerable to Ignite, and Jolt. Fire spells are the most effective against an Ice Cannon. If no Fire spells are available, Aero spells also work well. Similar to other cannon-like Heartless, such as the Jumbo Cannon, the Ice Cannon will hop from place to place, making it a slow moving target.