Eiscue is a medium-sized, penguin-like Pokémon with a large ice cube on its head. This ice cube is a light blue, with specks of white seen dotting the surface of it. Two oval-shaped eyes and a beak are seen on the front of the cube. It also has a long, antennae-like hair sticking out of the cube. Eiscue's body is black and white with light blue accents around its belly. It has two flippers and yellow feet, with three toes on each. Its true face within the ice is colored light blue with two white eyes, black eyebrows and a white beak.
Eiscue comes from extremely cold areas. It can produce cold air from inside its head to create ice to protect its head from heat. The ice, however, is not very durable, as a strong blow can shatter it, after which it goes on to create new ice. Eiscue are easygoing and are often seen aimlessly floating in the ocean with just its ice-covered head floating on the surface, occasionally washing up on distant shores. It never panics or gets upset whenever it ends up in a new land, instead continuing due to its ability to adapt. People love the silly, worried expression Eiscue shows when the ice on its head shatters. Eiscue's hair is connected to the surface of its brain, which then chills the air around it when it has something on its mind. Eiscue also uses its hair to catch prey in the sea, by dipping it into the water like a fishing line.
Multiple Ice Face form Eiscue debuted in Grabbing the Brass Ring!. One of them accidentally got lost, briefly assuming its Noice Face form a couple of times, before returning to its home by the end of the episode.
Eiscue can be seen as a parallel to Stonjourner, the former being exclusive to Shield while the latter is exclusive to Sword. Melony and Gordie, the version exclusive Gym Leaders of the Circhester Gym use the two in their teams. (Eiscue with Melony and Stonjourner with Gordie.)
Eiscue seems to be based on a penguin with an ice cube for a head. It may also draw inspiration from the great auk, a flightless bird that used to inhabit the British Islands before their extinction. Many of Eiscue's behaviors are similar to the biology and history of the great auk: they float with their heads exposed above water, their heads would get whiter during the winter season, and they were hunted to be used as fish bait.
Eiscue may be derived from Eis (German for ice or ice cream) and a corruption of ice cube.
Korippo may be a combination of 氷 kōri (ice) and 立方 rippō (cube).