Airy

Airy first debuts in OSS 5 as one of the possible joiners. She is not shown to have a clarified gender and does not have any speaking lines.

Airy is brought back as one of the possible competitors in OSSU, and is described to as female and reveals an ability to speak in post-OSS short comics.

Appearance
Airy is nothing more than a single unit of air. As such, she is invisible. Airy also has no visible facial feature or even any limbs, but can still talk and hear.

Personality
Airy sees everyone in an honest light. She seeks a fair competition and expects nothing less. She is a rational thinker, and understands her surroundings well. Most come to her when they need something solved.

With that, though, Airy is also seemingly a little apathetic. While she forgives others easily, she also often resorts to ignoring those who bother her, instead of confronting them. Along with that, she is incredibly stubborn when angered.

Trivia

 * Airy is the only character in the pool of OSS joiners who did not have a recommender. She was originally a joke character.