I love the idea of having a friendship hidden, but I love it more when that friendship gets competitive, and I can totally see demoman and soldier finding each other while jumping and bumping into each other. (Plus a Quickfix Medic)
This drawing has a more cartoony style to match with the perspective of the drawing, and for the background I painted the map "Process" in a minimalistic style (because then I blurred it to give a speed effect)