Well, I'll add them as I introduce them, so...:
Thardon
Age: 'Pfft, Odin knows!' (Actually, he's 34)
Race: Aesirian
Gender: Male
Directly descended from the Aesir of Norse mythology, he is larger and stronger than an average human. The hammer has Aesirian origin, too.
Markoi Richardson
Age: 23
Race: Human
Gender: Male
Due to advanced weapons training, special equipment, and bionic reconstruction, he has become a deadly soldier.
Adrian Carling
Age: 28
Race: Human Bionic
Gender: Male
The leader of his EO-AU, he needed major bionic reconstruction, before making a surprising recovery from an explosion his unit experienced.