Airy was the pseudonym of the host and main antagonist of both the first and second season of ONE.

As revealed in You Move, I Send, Airy created the show following his first death on Earth where he found himself in The Waiting Room and, after spending "a really long time flipping through the radio" eventually discovered a preferably livable alternate universe. After spending some time constructing a planet and hooking it up to a computer, he created a predecessor to the current version of ONE, which was apparently made as a way of coming up with a reason for teleporting the 6 contestants. Due to him accidentally killing all but one of the contestants with an unintentionally oversized rock, however, it was abruptly cancelled. Nearly a decade later, the current version of the show (which is typically referred to as Season 2) was made (with Airy taking precautions to ensure it wouldn't go the same way as the first), though would once again end prematurely following his second death in Self-Titled whilst he was preparing for a third season that never came to fruition.

Prior to You Move, I Send, his physical appearance as a trawler copper lantern was never shown and instead appeared as a disembodied voice in the sky and was implied to be made of air from Freefall up until Bottle Episode.

Before ONE 17, Airy's true appearance was yet to be revealed, as he was never been shown on-screen, with only his voice being heard. It was implied that he was intangible as he was only air, going by his name. However, it was hinted at that he used a microphone to talk to the contestants, as shown by the loud volume and audible clicking noises in "Freefall". The only clue there was for Airy's true appearance was Abstracty turning into a lamp-like figure with a similar voice to Airy's, causing people to theorize he was more golden with a spike on the top.

As of ONE 17, Airy has now been shown to be a copper-colored lantern (although slightly broken) with two knobs and a large deflector, while his entire body is mildly damaged and dulled. He has only one eye, as part of his globe is shattered, presumably from the incident from “The Plug Dream”. He is still able to light his burner by turning the knob on his lower body, which he occasionally also rests his arms on.

As of ONE 18, Airy's globe has been fixed and he is in full condition after dying and ending up in The Waiting Room.