Part 1
Despite the serum running through his veins, Steve had always identified himself in private first and foremost as a soldier. Not a super soldier, not the emblem for justice or sentinel of liberty or any of the other titles that had been strapped onto the Captain America mantel over the years. He understood the point and purpose of those loftier labels, what they meant for people who needed a banner to fall under in times of need. However, he always only acted in a way that felt true to himself, and that truth was of someone who had spent more than one lifetime in the field under clouds of smoke and fire, beside men and women old and young, struggling on elbows in trenches towards preserving ideals at the risk of their own lives. In the dirt amidst rivers of blood he'd learned to trust his instincts on what evil looked like. Those instincts weren't infallible, of course. He'd read people wrong in the past and at worst others had paid the price. However, Steve had long ago adopted the opinion of trusting his gut on not rushing a judgment, on assuming by default that there was a man behind any monster mask until proven otherwise. He'd seen far worse than a vampire in his day, and he'd also seen a vampire who chose to do good with her life in his world.
Right now, his instincts were telling him that she was no monster. Despite the blood and the dirt, things he was intimately acquainted with in a different way, she had the appearance of a pretty young woman in casual attire caught in circumstances she was doing her best to make the most of. If not, she was the world's best liar and in this small town it wouldn't go unnoticed for long. His gut told him though that she wasn't, and Steve, whose whole life had hinged on one person giving him a shot when there was no reason to, refused to be hypocritical enough not to extend the same to others.
"You're welcome." His hand dropped back down to his sides after she took the tissue and he listened in silence as she spoke. "I'm Steve, it's nice to meet you, too. Sorry if I startled you." What she said sounded plausible, as much as anything did these days. He'd heard far stranger in his time and it was usually the truth. That it was strange didn't mean that it wasn't problematic, though. Both for Caroline and for the town itself. It was commendable to not want to feed on humans, and his expression softened further at hearing that, a slight smile of approval coming to his face at her vehemence against it. However, he had an idea of what not eating might do to a vampire, and he also knew what having impulses that were difficult to control might do. Hell, not eating had driven people to turn on one another, starvation wasn't a risk limited to just vampires.
With a small head shake Steve replied honestly, "It sounds like you're trying to get by without hurting anyone, and that doesn't sound bad to me. The situation is what's bad, and it says a lot about a person when they try not to let that get the better of them. I know someone who's the same way." He respected when anyone struggled with a situation like that and came out on top of it. His expression grew thoughtful then. "So how much blood do you need, and how often?" It never entered his mind to turn on his heel and walk away without trying to help, if there was any way he could. With the serum he was far more durable than most and healed at an accelerated rate. The town of Storybrooke had welcomed all of these refuges into it, and the least Steve could do was try and keep it as safe as possible. For all their sakes, including Caroline.