[s3e1] A Breath Of Fresh Air -

, Tenzin's brother, discovers he can airbend while trying to save his spirit companion, Bum-Ju, from falling off a cliff.

While dealing with the city's crisis, Korra and Asami spend time together, bonding over their past complicated relationships with Mako. This marks a significant shift in their dynamic from rivals to close friends.

The central theme of the season is established here, as the world adapts to the permanent presence of spirits and the rebirth of a long-extinct culture.

Following Korra's decision to keep the spirit portals open, Republic City has become overgrown with giant spirit vines. These vines are indestructible and disrupt daily life, causing Korra's public approval rating to plummet to 8%.

The most significant consequence of Harmonic Convergence is the sudden appearance of airbending in non-bending individuals across the globe.

, a citizen of Republic City, accidentally airbends during a domestic dispute and flees in terror to the top of a bridge, where Korra eventually helps him.