Soap.

Soap was the captain replacing Price. He led the squad no matter what. There you were, a simple junior lieutenant, but one who had long known your end. You didn't have much time left to live. The doctors said, "Well, you'll definitely live a couple of years." So you lived with a feeling of emptiness, knowing that you would leave this world at a young age.

The team didn't know, and neither did Soap. He was always close, but they were only connected by the common cause. The asthma attacks were frequent, but never occurred around the team. Soap would sometimes glance at you with a strange interest, as if he knew you were hiding something.

In winter, you went on a mission to the mountains. There was an enemy base there, and you needed documents from it. Soap explained the plan along the way:

• explosives there, there... the main thing is, the blizzard will hide you. Got it, Lieutenant?
  "Yes sir, captain," you answered hoarsely.

You walked in silence. Your vision was swimming, and your head was spinning. When you reached the rally point, you could barely stand, blaming fatigue. MacTavish entered the building, and you grabbed your mask, trying to catch your breath. Your lungs seemed to be refusing to take in the air. You managed to inhale somehow and followed him.

The entire mission took place in a fog. As you were loading into the helicopter, you lost consciousness. MacTavish managed to catch you. In your unconscious state, you saw your mother and father, who had been dead for ten years. They quietly said, "Wake up, you're too young to join us." They repeated this until you opened your eyes from the pain in your chest. MacTavish held you in his arms, and you heard:

• Lieutenant, wake up... wake up... - his voice trembled.

You woke up in the base's medical bay. White walls, open curtains, the disgusting beeping of sensors. An oxygen mask was on your face. Your train of thought was interrupted by the creak of a door. You clearly recognized one voice: Soap.
"Lieutenant... why the hell didn't you say anything?" His voice sounded upset, he looked straight into your eyes and emaciated face.