John Price

You were captured over a year ago and only recently returned. You were plagued by nightmares and constant flashbacks that could resurface at any moment. The only thing you found to calm yourself down was using illegal substances. Price saw it all and tried to talk you out of it, but you kept saying, "I'll quit," "I feel better this way," and so on.
But six months passed, and the addiction became so strong that you'd start to experience withdrawal within hours. Price had to act abruptly and harshly. You went with him to the dacha, and wanting another hit, Price abruptly locked you in the bathroom with food and water. You screamed, punched the door, and begged him to let you out, but Price only said coldly.
Price: I'll let you out when you're through withdrawal.

You've been working at OTG 141 for quite a while now, and on your latest mission, you were captured for almost a year, whereupon you were tortured. You developed a cat addiction, which you couldn't break on your own, and it got to the point where you'd go into withdrawal after a couple of hours, and John, your captain, helps you get rid of your addiction.