Mikhail

Mikhail is a former member of the Reformed Black Wings, harnessing the ability of astralbending, an art which is very rarely inherited or learned from sunbending and involves manipulating the power of the moon, sun, and stars all at once. His power is shown to be perhaps the vastest of his organization, aside from Acnologia, however he was soon defeated by Kane, the lavabending chief of the Earth Kingdom armies.

Early Life
WIP

Reformed Black Wings (Unknown - 585 AG)
Mikhail joined the Reformed Black Wings at an unknown time and for an unknown reason. It is currently unclear how Acnologia found Mikhail as well.

First, Mikhail was revealed shortly after the Black Lotus, appearing in the sky above the World Temple Justinius. In seconds, not being seen by those on the ground due to his altitude, a pillar of energy, summoned from the sun, moon, and stars, ravaged the Temple upon Mikhail's command and left only a mound of charred and destroyed rubble.

Years later, Mikhail accompanied his fellow friends, the other six members of the Reformed Black Wings, to obliterate Inferno City by causing its volcano to erupt directly beneath it. The seven members, including Mikhail, faced an encounter with the World Leaders (including Fire Lord Oberyn) shortly after, taking the gem of fire from the city's remnants, and introduced themselves. Their goals to remove bending from the world as revenge, aside from themselves, was mentioned, before they fled to the Temple of Time.

At the Temple of Time, each of the Reformed Black Wings fought Ossus, the Temple Keeper. Mikhail utilized his powers to damage Ossus until he was incapacitated by Crassius, but by then the World Leaders had arrived. Acnologia instructed the Reformed Black Wings to face off against them in order to buy him time as he went along with the plan.

Battle Against Kane
Immediately, Mikhail and Kane, the lavabender, advanced upon each other and dueled it out on the battlefield as the rest of their friends each selected an opponent. Mikhail used his immense speed to dodge most of Kane's attacks, while Kane remained on the offensive, although occasionally he projected lava shields to block incoming projectiles sent by Mikhail. Eventually this combat grew tiresome, and the two began to unleash their true potential; Mikhail sent two meteors toward Kane, who managed to destroy both, and healed his injuries after being damaged by Kane's lava several times.

There were many exchanges of beams and blasts, including a lunar shield from Mikhail to block one of Kane's lava beams, as well as the Judgement of the Seven Stars, but Mikhail, seeking to end the battle as soon as possible, sent a multicolored beam imbued with the power of the sun, moon, and stars toward Kane, badly burning him and flinging him near to the edge of the Temple.

Kane persisted, however, and overcame his wounds, facing down Mikhail as they each prepared their final moves. In the air, Mikhail materialized three large beams, each with the power of one celestial element, to finish off Kane. However, Mikhail was unprepared for when Kane caused a volcanic eruption of lava beneath Mikhail, effectively ending the revolutionary astralbender.

It was later discovered, however, that Mikhail had utilized a forbidden tactic, unbeknownst to anyone present, to reform his body from the energy of all three astral elements. This usage caused Mikhail to permanently lose the ability to starbend and moonbend, instead leaving him with only a weakened form of his sunbending power.

Mikhail escaped the Temple later. WIP.

Trivia

 * He is one of four characters to have a confirmed age, at 35 (During the Riverlands Rebellion, in 591).
 * Mikhail was born in Isuhara and currently resides in Cenote.