Aidan Flamberge

Aidan Flamberge is the Castle Master and the final boss of Lunar Shadow.

Story
Aidan arrived on Newerth along with Alexis Flamberge approximately ten years before the events of Lunar Shadow -- this was well before Mi'aro Genryutsukei made it illegal for people from other planets to be in Tirahnys.

In 2013, he was rebuilding the original Lunar Soul Castle. In canon, it is not known when the Lunar Soul Castle was first built or when Aidan became the Castle Master. In Solar Shadow 2, the castle was first built in 1995 by Terrah Horton, who was defeated by Aidan in 2011.

He then arranged the kidnapping of Valkyrie Horton, Xydia Horton, Ladislaw Smit, and Ilina before announcing that all on Newerth would die in two years and all who tried to stop him would be killed before they could reach the castle. Evan O'Neill was able to reach it, but was then defeated by Aidan following the events of Lunar Shadow ZERO.

In 2015, Serenity Horton arrived at the castle and was eventually defeated in Lunar Shadow.

In-Game
In Lunar Shadow ZER0, Aidan uses an unknown AI.

In Lunar Shadow, the boss fight consists of five phases. The first one uses the AI of The Doctor. After this, Aidan and his fiancée Tranquility pilot the Death Orb Mk. II for the remaining four phases, which use the AI of the second, fourth, third, and fourth phases of Ballos respectively. The eight platforms generated by the third phase remain for the rest of the battle, and the fifth phase generates an additional eight.

Trivia

 * The second phase is vulnerable during the dialogue immediately preceding it.
 * The body of the fourth phase is vulnerable, and destroying it before its floating eyes will skip the fifth phase and defeat him immediately.