A creature of great power from Kounen Shimabukuro's serialized work Gourmet's Captive, introduced in Gourmet's Captive 143, "Living Dynamite".　Discovered and named by the god of food, Arcasia, about 600 years ago; its classification is unknown; it has no genitals and its method of reproduction is unknown; it is extremely rare, but its lifespan is abnormally long; it is a mystery as to when it began to live on Earth; according to a geologist, fossils resembling this creature have been found in layers of the earth that are hundreds of millions of years old.　Nitro is feared for a number of reasons.　Vitality Although originally very vigorous, if they run out of food or if their habitat deteriorates. If there's no food or if the habitat deteriorates, they enter a state of anabolic dormancy called "a thousand sleeps," which can last up to a thousand years. They can sleep for thousands of years. They have escaped many catastrophes with this skill.

Fierce No matter how powerful the monster will attack, the degree of danger and difficult to deal with the degree of stimulation will explode as a little bit of "nitroglycerin (nitroglycerin)", so the Arcasia named after the harmonic "nitro (nitro)". So Arcasia was named after the harmonic "nitro".　High Intelligence Although they are rare in number, traces of their civilization can be found from the Ancient Age, and the "Gourmet Pyramid" is a remnant of their civilization.　"Gourmets have the intelligence to rationalize food, and their overwhelming appetite and obsession with food far exceeds that of humans, and they create "creepy menus" to cook humans. -He also creates "creepy menus" to cook human beings.　The most important thing is that he knows how to get "GOD", and it is because of him that Arcasia discovered "GOD", and the time when it started to operate was the time when the "Gourmet Eclipse" was going to take place, and also the time when the "Gourmet Eclipse" was going to take place. The time when it started to move was the time when the "Gourmet Eclipse" was going to take place, and the time when "GOD" was going to come back to the world.　Four Nitros have been discovered, one appeared in the vegetable sky, two awakened from the Gourmet Pyramid, one was killed by Aru and Zebra, the other escaped, and there is still a cub imprisoned in the Gourmet Prison. And based on the words of Chief Cook Auxiliary Nesni in manga #156, the Gourmet Guild also keeps several Nitros.