Lah Deus

Great Emperor Lah Deus, also alternatively translated as Ra Deus, is the main antagonist of Choushinsei Flashman. He is the leader of the Reconstructive Experiment Empire Mess sought to become the ultimate lifeform in the universe.

He was voiced by the late Unshō Ishizuka and was portrayed in-suit by suit actor Hideaki Kusaka.

Lah Deus
Although appearing to be a massive alien overlord, Lah Deus is in actuality a mass of genetics brought to life desiring to gain as much genetic materials as possible in order to become the ultimate lifeform of the universe. To fulfill that end, he has recruited several Great Doctors over the Eons, some he abducted like Lie Köpflen when the latter was still an Earth infant. As a result, he has undergone several reconstructive operations in those years.

Before the finale, after his true nature revealed, Lah Deus was betrayed by his subordinates after he was mutilated by Sir Cowler and Bo Gardan in vengeance. Afterwards, Köpflen took over Mess and the remains of Lah Deus as genetic base of Deus Beast Warriors' creation.

The Deusura
However, Lah Deus eventually returned back from the dead and tried to retake his organization, punishing Köpflen for his treachery and revealing Köpflen as an Earthling. Köpflen, refused to submit to Lah Deus, threw the latter into his Gene Syncronizer. He reconstructed his former superior as a new Deus Beast Warrior known The Deusura and sent him to attack Flashman. The Deusura possesses the great power of Lah Deus himself, but in a more savage, destructive form compared to the calm power of Lah Deus.

At first, Lah Deus/The Deusura appeared as a rampaging Deus Beast Warrior, but Lah Deus eventually regained his sanity and his former form, before engaing Flashman into an ultimate showdown. The Emperor overpowered Flashman first, but once Sara returned, the team used two consecutive Rolling Vulcans and destroyed Lah Deus. Köpflen, fully revealing himself as Mess' new leader, sends giant-creating Kuragen to grow Lah Deus into his The Deusura form. The Desura was then destroyed by Flashman with the Flash King, along with the full body of Lah Deus once and for all.

The Demoss
However, this was not the ultimate end of Lah Deus. After being destroyed by the Flashman, Lah Deus' broken mask was taken by Köpflen in order to extract its DNA for his final creation, The Demoss, by fusing the mask and DNA of Lah Deus with the body of the Kuragen, the first being created from Earth creatures during Mess' invasion. Emerging as a three-legged giant, The Demoss lost everything within Lah Deus aside from his mask, turning into a mere rampaging beast even worse than The Deusura. It utilized the tenacious indestructable nature of a jellyfish while possessing Kuragen's energy-control, allowing for it to fully absorb and release energy within it's own body.

Having been weakened to the brink by the Anti-Flash Phenomenon, the Flashman are forced to spend 8 of their final 10 hours on Earth fighting The Demoss in a final battle with their mecha. When they try to use Flash King, it absorbs their energy attacks. As a result, it evolved into a stronger form as soon as the Lah Deus mask on its face mutates into a more monsterous form.

Ultimately, the Flashman used Cosmo Sword on the body of The Demoss, but it ends up breaking, leading to the Deus Beast Warrior to attack and destroy the mecha. In the final brink of battle, the team switched to Great Titan and team realizes the infinite energy emission of Titan Nova. They fired the energy over and over until The Demoss was overloaded with energy and exploded, taking both Kuragen and the last of Lah Deus' genetics with it, and finally ending Lah Deus' legacy forever.