The Sword for its Sharpness (гет)

What if, instead of Steve Rogers, there was Stephanie Rogers? How would her relationships and actions change? A mostly canon-compliant story in which a female Captain America breaks hearts and saves lives.
NOTE: This story was first posted on FFN immediately after I wrote it in 2015. I plan to add one chapter a week so I can feel like Charles Dickens, until it's all here. Thanks for reading!