Aira is student at Momo and Okarun's high school. A vain, popular girl who thinks that Momo's secretly a demon and she’s been chosen to protect the world from her. Aira is proud of her own beauty, treats being nice to people as noblesse oblige, and spreads a bunch of nasty rumors about Momo. She's not particularly good at being effectively mean, though. Later, her motives change to trying to hit on Okarun and make herself out to be the leader of their friend group.