The Doctors Association Hoody
He’s not technically a medical doctor. (Unless he was? Who can keep track of all that canon?) But think about it: nothing says “do no harm” more than being a galaxy-trotting hero with a menagerie of enemies, and yet still not relying on something so violent/useful as a gun. This design’s perfect for that one friend of yours in med school, or that friend of yours who knows a telepathic alien predator-snake when they see one, or that friend of yours who (SPOILER!) was actually you all along.