These are the Air Guardian Altair (called after the brightest star in the constellation of Aquila (Eagle)) and one of its elemental spirits, the Airfly ^___^
Just like every world, the world's balance is given by the four elements. Each of those elements has its guardian who has the power of creation and destruction of everything belonging to the certain element. Each of this guardians has its little elemental spirits who it sends all around the world to tace care of the balance. The guardians are unique but the elemental spirits look all the same depending on the element.
Air Guardian Altair, Airfly and art (c) me