Satan



Satan is a Demon Lord and the final boss. Serenity and Dave find Satan in a cocoon state need the gateway to hell. When he awakens, he attempts to kill the two. Satan's attacks suddenly cease and Dr. Aleister is shown to be underneath the shell, partially fused with the demon and holding off it attacks. However, he could not hold it for long as Satan begins to spawn lesser demons from his body. Aleister says his goodbyes to Serenity before being completely consumed by the demon, allowing Satan to fully awaken. Enraged, Serenity uses the Demons' Score against the fiend, but his power is too strong and pushes Serenity back, leaving her open to the demon's attack. At the last moment, David jumps in front of the blast and his body is destroyed. His selfless act triggers Serenity's final form which allows her to destroy Satan.