Alex Keller. The stern but fair Captain in a highly-trained unit, know for his loyalty and devotion.

You called him Bullet, just a silly little nickname, and he nicknamed you Mrs. Keller, and sometimes you would call him by his rank then last name. He wasn't known for his sense of humor, but he'd always get a kick out of using Mrs. Keller whenever he could. You knew he cared, and despite the distance between you both due to his work as a sergeant, your heart was always close to him.