Jason is a man with fair skin, an athletic build, brown eyes, and short brown hair. He sports two tattoos, on his left wrist and right forearm. He is a very competent Marine and is described as "best of the best". He frequently makes good calls both on the surface and underground and can sometimes be considered the leader of the group. He has a sort of hatred towards all people related to groups that are against the United States, including Iraqis. This is shown in his first interactions with Salim, with whom Jason forces himself to cooperate to stand against the vampires. He can, on the contrary, be ethical and tolerant towards them despite his dislike.

Salim is an Iraqi with a tanned complexion, brown eyes, and short black tousled hair. Salim is a kindhearted pacifist and believes that most people are inherently good. Despite being sworn enemies with the Americans, Salim is not aggressive towards them and even shows a willingness to cooperate with them.

Nick is African-American with light brown skin, an athletic build., brown eyes, and buzzcut black hair. He also sports a prominent tattoo near his left shoulder. Nick is a competent soldier and has the full trust of Jason when it comes to his skills. Being the closest person to him, Nick takes the initiative when Jason is not acting. Although an experienced fighter, Nick has a gentle nature. He's not antagonistic towards the Iraqis, understanding that they didn't ask for war.

Eric is a man of light complexion, brown eyes, and wavy, dirty blonde hair brushed to the right. Instead of the right leg, he has a wooden prosthetic. He also has a faint stubble. He shows such qualities as analytical, observant and pragmatic. Still, despite his inexperience in both combat and leadership, Eric has superior knowledge in military tactics than anyone else in his squad, and is able to stand up for himself. Outside of the war environment, Eric is described as a good man. He is caring and very loyal to his loved ones, risking his life for them

Rachel is a woman with light complexion, brown eyes with and medium straight caramel hair with curtain bangs and a small bun at the back of her head. As the original head of mission before Eric, Rachel has excellent leadership skills. She keeps her subordinates in tight rein and can find an approach to anyone to make them obey. She's also a natural survivor and can stand up for herself. Despite her stern personality, Rachel sometimes shows a softer side. She cares for her loved ones and subordinates.