The one that's kind of canon.
Captain Noah Puckerman. Yeah, he hadn't expected to actually be good at flying planes for the Air Force either, but now, almost six years after enlisting, he was a Captain, and led his own company of fighter jets. It was kind of awesome. He'd seen the world, and had just come back from his fourth tour of duty. Thankfully, this mission hadn't been too dangerous, but still, the reason he was in New York rather than back in Lima was scarier than anything else.
Shelby Corcoran had died. She'd gotten breast cancer three years ago, and two years ago it had spread. She updated him regularly, mainly because she didn't have any significant others and he still tried to be a major part of his daughter's life. He didn't have custody, but Shelby let him see her when he was in the country, and his girl was probably the most beautiful seven and a half year old he'd ever seen. He had a picture of her in his wallet now, even, and tomorrow would, after burying Shelby, start the legal procedure to get custody of his daughter and keep her out of the foster care system. She was in a home for right now, and despite Puck's attempts, he hadn't been able to spring her. It was frustrating and he just needed to focus on something else right now.
Which is why he stood, in uniform, outside of the door to Rachel Berry's apartment. He hadn't seen her in five years, and he'd had to do a lot of snooping to find out where she actually lived - on top of sneaking past the doorman to get in the elevator to her floor - but he was pretty sure she'd let him crash with her... well... indefinitely. She had a show tonight. He'd wanted to go, but he'd been with Beth until he'd been made to leave, so he waited instead, hoping that the Rachel Berry who had once taken a chance on him back in high school still actually cared.