The final sketches
So after much back and forth I essentially combined the two sketches above, hoping to convey a feeling of desolate searching. A simple medic looking for someone to heal.
First i drew the one on the left, which i liked, but I felt i could push the backpack even further. This is sci-fi after all, why would it not be ridicously big. So that's what I did and how I ended up with the sketch on the right. I'm gonna use that as my final sketch I think, but I'll still need to figure out the colours and how the line art will fit together.
Oh and if someone was wondering the backpack is not only a tank of water, but also has basic and advanced medical supplies, defibrilator and basic mechanical bone saw. The tubes are a part of a water cooling system in the armour to prevent overheating. And the rolls and sticks are basic stretchers that can also be used as a make-shift tent.