Valkyries

Valkyries are the order of warriors who reside in Valhalla. Other amoebic bases have similar names for their members, such as the Keres from Karpathos, and the Zhnyetse in Vladivostok. They are grouped into teams of four.
To become a Valkyrie, one must first be selected, generally after observation by G Team and the team in which they'll reside. Then they must die, to the outside world at least. All but one Valkyrie faked their death in order to hide their existence.
A Valkyrie must then endure training of the most extreme order, including pain, death and kill training. They are then educated in every form of spycraft, every kind of technology and weapon and vehicle, becoming the supreme warrior elite of Earth.
Valkyries wear Thaco armor and have Tikaris. They have multipurpose microwaves. Death remains in their arsenal, and they have Dr. Niide to bring them back to life as needed. It is often said that a Valkyrie isn't truly dead until you see their liquefied brain.