Rainicorns

Rainicorns are a species of rainbow/unicorn creatures that live in peace in the Land of Ooo and also the Crystal Dimension.

What is the history of the Rainicorn-Dog War in Adventure Time? toggle section

In Adventure Time, the Rainicorn-Dog Wars were territorial conflicts in the Crystal Dimension between Rainicorns and dogs. These millennia-long wars were recent enough for characters like Bob Rainicorn to recall. They may have transpired alongside human history, prior to the Great Mushroom War. Post-war, dogs and Rainicorns cohabit peacefully in the Crystal Dimension.

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Why do most Rainicorns speak Korean in Adventure Time? toggle section

Rainicorns in Adventure Time, notably Lady Rainicorn, predominantly communicate in Korean. This language choice is maintained across various show dubs, including Thai and original. The Korean voice actor Lee Myung-hee provides Lady Rainicorn's voice in Korea. The decision to have Rainicorns converse in Korean contributes to their unique character attributes and augments their uniqueness in the series. Lady Rainicorn's dialogue is occasionally translated for viewer comprehension.

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What makes Rainicorns different from traditional unicorns? toggle section

Rainicorns, featured in Adventure Time, are distinctive unicorn creatures with a rainbow of colors on their bodies. Their sizes vary, with some equalling the length of a horse. They possess unique abilities, such as flying by intercepting sunlight beams and altering the color of objects using a chromatic beam from their horns. Rainicorns age swiftly, with their young maturing from infancy to adulthood within days. Many Rainicorns communicate in Korean and have a history of amicability towards dogs.

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Who are the known Rainicorn characters in Adventure Time? toggle section

In Adventure Time, Rainicorns are a species combining traits of rainbows and unicorns. They inhabit the Land of Ooo and the Crystal Dimension. The known Rainicorn characters are Lady Rainicorn, Ethel Rainicorn, Bob Rainicorn, LeeRoy, and Baby Lady Rainicorn.

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What is the significance of the colors on a Rainicorn's body? toggle section

Rainicorns, featured in Adventure Time, display a rainbow of colors, except for orange. They have the ability to fly using reflected sunlight and can alter the color of objects using a chromatic beam from their horns. Lord Monochromicorn, a unique Rainicorn, is black, absorbing light, contrasting Lady Rainicorn's rainbow-colored body.

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Background[]

Little is known about the background of the Rainicorns, other than there was a Rainicorn-Dog War. One dog saved Bob during the war, so he and his family - Ethel and Lady - are friendly to dogs. Most Rainicorns speak Korean, though some speak English.

Appearance[]

Rainicorns are unicorn-like creatures with bands of different colors down their body, similar to a rainbow. Despite being part-rainbow, not every rainicorn have the colors of the rainbow on their body. An example being Lady herself lacking the color orange (something one of her hybrid children, Kim Kil Whan, end up having), as well as some of the rainicorns in the background of "Lady Rainicorn of the Crystal Dimension", where some of them sport only one color but in different shades. Additionally, despite being part-unicorn/horse-like, they seem to lack the visible ears.

Their bodies vary in length, but they generally appear as being quite long and arch-like, there are rare cases wherein a rainicorn can be the length of a regular horse. Examples being in Lady's family; Ethel is about twice as long as Lady, who is, in turn, three times as long as Bob, while Bob is roughly the length of a normal horse, though he is shorter in height.

Abilities[]

All Rainicorns possess the ability to fly by intercepting beams of reflected sunlight and "dancing around on them."^[1] They also have the ability to change the color of any object by shooting it with a chromatic beam fired from their horns,^[1] and the power to stretch their bodies out to various lengths, much like Jake. They also age much faster than other creatures, as after a little more than two days Jake and Lady Rainicorn's children were already physically older than their father though due to them being Rainicorn-dog hybrids, true Rainicorns might age faster than two days.

Notable Rainicorns[]

Part-Rainicorn hybrids[]

Charlie (Rainicorn/Dog/Shape-Shifter hybrid)
Kim Kil Whan (Rainicorn/Dog/Shape-Shifter hybrid)
Jake Jr. (Rainicorn/Dog/Shape-Shifter hybrid)
T.V. (Rainicorn/Dog/Shape-Shifter hybrid)
Viola (Rainicorn/Dog/Shape-Shifter hybrid)
Bronwyn (Rainicorn/Dog/Shape-Shifter/Bear hybrid)
Gibbon (Rainicorn/Dog/Shape-Shifter/Wolf hybrid)
Beth (Rainicorn/Dog/Shape-Shifter/Many unknown species hybrid)
Other Pups (Rainicorn/Dog/Shape-Shifter/Various unknown species hybrids)

Trivia[]

The term "Rainicorn" is a portmanteau of "rainbow" and "unicorn."
Jake claimed that for thousands of years the Rainicorns battled the dogs over territory in the Crystal Dimension. The outcome of the war is never outright stated, but it can be inferred that the Rainicorns have some stake in the dimension today as Lady Rainicorn's parents come from there in "Her Parents."
Rainicorns eat humans, as in the episode "Her Parents," Ethel and Bob Rainicorn try to eat Finn. After the seeming extinction of humans in Ooo, they moved to a soy-based substitute. After Jake prevents this they settle for a picnic of "Soy people," which is supposed to taste just like the real thing. Finn's reaction to tasting it implies that even humans like himself find it delicious.
- Rainicorns eating humans is one of the reasons as to why there are no humans on Ooo apart from Finn; during the flashback in "Everything Stays", Two Bread Tom says one of the humans' fears are "those hungry-looking rainbows".
Rainicorn, in Korean, is 무지개콘 (pronounced 'mu-ji-gae-kon'), a portmanteau of 무지개 (rainbow) and 유니콘 (unicorn). Alternatively, it's transliterated as 레이디 레이니콘 (pronounced 'lae-i-di le-i-ni-kon').
Even though Rainicorns are rainbow hybrids, they do not have the color orange on their bodies.
The episode "Jake the Dad" showed that Rainicorns age rapidly, as Lady and Jake's pups developed quickly from infants into young adults over the approximately two days when Jake was visiting, and once he returned to live in the tree-house with Finn shortly after this, he said that they were already effectively older than him.
Seeing how Lady hasn't seemed to continue to physically age during the show, (She grew to adulthood within a week yet still looks physically the same for five years)^{[citation needed]}, it seems the rapid aging slows down at some point, or Rainicorns despite the aging can still look young for a long time.