Gunter

Gunter (or Gunther) makes appearances in "What is Life?," and "It Came from the Nightosphere" in which she is Ice King's main penguin servant and friend. One of her known duties include using her head as a stand for the Ice King's video game machine. She also tried to warn the Ice King that Finn and Neptr were in the room. Gunter is seen in the Theme Song, in the Ice Kingdom, and with other penguins. It is possible she is one of the two penguins kissing. She may also have been one of the penguins in the group who wakes Ice King up from his coma in "Prisoners of Love." She also might have been one of the penguins attending the Ice King's wedding in "When Wedding Bells Thaw." Gunter is mentioned in "What Have You Done?" when Ice King says: "Gunter, pick up Finn's dead carcass." She then appears again in "It Came from the Nightosphere", where she almost gets her soul stolen and is instead dubbed as "the most evil thing in the world". She appears in "The Chamber of Frozen Blades" where she is very sick, but it turns out she was pregnant, and her egg hatches, revealing a floating pink kitten. Her name may be a refrence to the singer Gunther

Appearance
Gunter looks like a regular penguin with big eyes, a navy blue back, and a white flat belly. She is apparently very fat for a penguin, as Ice King has called her, "Daddy's little fatty", though this may only be a joke or a show of affection on Ice King's part. This is likely, since Gunter looks exactly like every other penguin in the Ice Kingdom. Although Gunter is a penguin, she makes a "quacking" sound.

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The Ice King sometimes gets agitated by Gunter's actions, such as when she accidentally broke his video game, but the Ice King seems to appreciate her company. She is very loyal to the Ice King and even though she is his servant, Gunter occasionally wanders off. She may be Ice King's best friend, but she may be his only friend. Ice King seems to pay more attention to Gunter then the rest of his penguins.

Trivia

 * Gunter is the only penguin not to have her soul stolen in "It Came from the Nightosphere".
 * Gunter, for some reason, was dubbed the most evil creature that Marceline's father had ever seen, indicating she may secretly be evil and smarter than others realize.
 * As revealed in the episode "The Chamber of Frozen Blades", Gunter is a female because she lays an egg. However, Ice King had always assumed she was male.
 * The father of the pink kitten is unknown.
 * In "What is Life?" the Ice King comments on Gunter gaining weight. This may be seen as a foreshadow of Gunter's pregnancy.