Death Master

Death Master who actually Satan King was the fallen creation of Shadow when Satan King was killed in Gingaman. His demonic form were presumbly destroyed by Gingazard.

History
After Senki was destroyed, but someone absorbing Senki body then create the new body. The ghost of Satan King confront GaoRed who is killed him. He going to fight the Created Org into Dark Satan Ring. In the first fight, Satan King using Senki body to fused into fallen X body the Second Body X. He has Senki's heart, but had evolved into the eye. He had the fallen wing after his original wing was destroyed. After the first fight, the Death Master was not dead yet. He see revealed the Satan King's cube form and control his body. After the second fight, he wasn't destroyed and revived into revealed as Satan King's ultimate form and real humanoid form resembled of Zero Two. He is finally destroyed by Created Org. In the causing destruction of Satan King, Senki were killed as well against Created Org. However, Satan King was not destroyed as true form and the true battle begins. After finale, the Death Master's fate causing virtual was vaporized then explosion into his death.