Self proclaimed as the "ruler of the dark universe", Alien Babarue was a cunning, trickster alien with a personal vendetta against the Ultramen and came up with an evil plan to destroy them.

To get his revenge on the Ultra Brothers, Alien Babarue disguised himself as Imit-Astra after capturing and hiding the real Astra, froze him in a block of ice, and abandoned him in the middle of space. Disguised as the Imit-Astra, Alien Babarue then stole the Ultra Key, a device that both maintained the Land of Light‘s orbit and was capable of destroying an entire planet in a single blast. Before he could escape, Imit-Astra was confronted by Ultraman over taking the key. Despite being overpowered by Ultraman, the Imit-Astra escaped the planet, leaving the Ultra Brothers to believe Astra had betrayed them and worse, without the Ultra Key to keep their planet in orbit, the Land of Light was sent into a collision course with Earth.