Sparrow

Bluntly put, Sparrow is kind of a know-it-all. Practically a walking encyclopedia for any part of the hostile environment that you're lucky enough not to have experienced firsthand, and always hungry for more knowledge. Sparrow demands to be taken seriously and tries to maintain a stern attitude to match, but it's a thin front, as he is easily flustered and quick to cave and participate in mischief. Despite this, no one can deny that he's the real deal as a medic, and his ability to keep a level head and stay focused during the worst of times is absolutely unparalleled.