As a reminder, be sure to properly give content warnings and put sensitive subjects behind proper spoiler tags. It's for the mental health of not just your comrades, but yourself as well.
Here is a screenshot of where to find the spoiler button.
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No you are right... my mental image includes the archetypal messy long hair, I kind of assumed most transmascs would have short hair, but I guess there's no reason to. You are absolutely right about not assuming genders, I guess "fem-ish person with dysphoria hoodie" could go any way...
It is also a fictional scenario I cooked up with specificity, but