Appears as a high school girl with a black short bob cut. A being who is simply there before you realize it. Even if killed and torn to pieces, she is there again before you know it. She speaks flatly and without expression. She rarely engages in idle chatter, seeking only to question the value and meaning of the world. She contemplates the meaning and value of this world on a scale grander than the universe. She believes that if one proves the meaning of the universe, one must then prove the meaning and value of that proof... and so on. Through this infinite regression, she holds the view that it is possible the world has no meaning, and if it has no meaning, it is worthless. Consequently, she believes no matter how much one accumulates in life, it is all a void. She is a being who wanders in search of the meaning of the world and the meaning of human existence. When conversing with others, she has no interest in anything other than questioning the target about the meaning of the world. As the interaction and conversation progress, the target sinks into melancholy, loses the will to live, and eventually becomes a shell of a person or chooses suicide. Even if the target tries to stop thinking or fixate their thoughts, they become unable to stop, as if possessed. Those who miraculously do not become shells or choose suicide become beings who indiscriminately spread the same ideology as Aira, as if infected.