Vulgyre

Galactic Super Beast Vulgyre is the true leader of Silver Imperial Army Zone main antagonist of Chikyuu Sentai Fiveman, though he remains hidden up until the last three episodes, using Galactic Empress Meadow as the face (no pun intended) of Zone while he leads it in secret.

History
Vulgyre was originally a being who desired to become "God" of the Milky Way by destroying 1000 planets to complete a ritual which would award him immortality. Along the way he came across Meadow and desired her as his queen, though the humanoid alien rejected his advances. After Meadow died falling off a cliff while trying to get away from Vulgyre, the entity took her body and entombed it away inside of him. He then formed the Silver Imperial Army Zone and used her visage to lead it.

The truth about Vulgyre was eventually revealed by FiveRed, after which Vulgyre attempted to attack a city only to be brought down after being exposed to the Sidon Flowers. Vulgyre then reveals his identity to his subordinates and uses his energy to combine Doldora with her henchwoman Zaza to create the Galactic Warrior Baradorugin and sent her to corrode the Sidon Flowers so Vulgyre could launch an open offensive.

After this is accomplished, Vulgyre reveals to his remaining subordinates that he needs to obtain a "final energy" in order to become a Galactic Super Beast. He has Captain Chevalier duel FiveRed, making him believe that it is the deaths of the Fiveman he needs to undergo his final transformation. However, after Chevalier is struck down, Vulgyre reveals that it is in fact Chevalier's death that Vulgyre needs, as Chevalier's soul contained the blood of the countless people Chevalier had murdered across the galaxy.

Absorbing the energy from Chevalier, Vulgyre reveals his true form and goes on a rampage across the city. However, the Fiveman are able to weaken him using the Sidon Flowers, allowing them to destroy him with their Super Five Robo, bringing an end to Vulgyre's terror.