Unknown

Origin
When Aster was born to Ash and May Phoenix, Unknown was formed into existence. He was born in the Realm of Darkness and grew up loathing his place there. He dreamed of being alive and free and resented his other half Aster for forcing him there, by being born without darkness in his heart. Unknown trained himself against the krawl of the world and became quite strong in power. He hoped for a day that he would be able to escape the Realm of Darkness in order to kill Aster to gain revenge for his life in the darkness.

Battle of the Datascape:
One day, Unknown saw that Aster entered a simulated computer world to fix a series of glitches caused by a man named Diz. Unknown saw this as his chance to escape and used his power to send a message and a doorway to Diz in order to bring Aster to him. Diz agreed, seeing the potential in Unknown and his potential role in The Society of Light. After Aster appeared in the Realm of Darkness, Unknown explained who he was and was insulted by Aster's lack of knowledge about him. Aster goes to fight Unknown, but Unknown quickly defeats him. Unknown sees that Aster is too weak for him and is let down by the fact that this is the battle he's been waiting for. He spares Aster and is able to escape the Realm of Darkness using the doorway Aster created coming into the world. Unknown raises a krawl beast to distract Aster while he escaped. Once freed, Unknown left the Datascape and met with Sartorius, the leader of The Society of Light. Unknown joins the Society in order to torment Aster from afar until the day he saw fit to finally kill Aster.

 Arkham City Madness: 

 An Infamous Incident: 

 The Scars of Dark Vengence: 

 The Four Keys of the Keyblade War: 

 The War of the Wizarding War: 

 Fate of the Lightest Destiny: 

 A Battle into the Unknown: