The final boss of Final Soldier

The Gader'el are the main antagonists of Final Soldier, an installment in the Star Soldier series. They are a group of alien invaders from the 25th century that have attacked Earth in the 23rd century by traveling from a space time warp over the Atlantic Ocean. These aliens consist of large, bio-mechanic creatures that have the ability to manipulate space and time. They have already conquered Earth in the 25th century and are now planning to conquer Earth in the 23rd century in order to ensure their influence on mankind, then going back further into Earth's past. While every country on Earth is fighting back against the Gader'el, scientists collaberate to create a weapon that is capable of destroying the Gader'el and their weapons. The result is that the spaceship Dryad is created, and it is capable of wielding all kinds of futuristic weapons. Its mission is to travel to the Future Zone to reach the Gader'el's headquarters and destroy their leader. An interesting fact is that the Gader'el and Dryad are all references to Greek mythology. A dryad is the name of a tree nymph while the Gader'el are known as Watchers, angels dispatched to Earth to watch over the humans.