When presenting the Game in Phase Three I proposed that the threat would be the weather in Wayfinder, slowly damaging them even suggesting that they could freeze or be buried in a sandstorm.
This wouldn't be enough we wanted to make sure there was agency in our game so we thought a group of humans wanting to destroy them would create that agency. We wanted them to be quite radicalised and to show that in their aesthetics. The role they would play in the gameplay of wayfinder would be to present a threat that you would need to carefully avoid. if they found your group they would start destroying the robots you have worked so hard to bring along with you. The fact they are humans mistreating the robots would also help build sympathy for the robots rather than them just being destroyed by the environment.
So we used meta human to make a realist person, then used marvellous creator to give them accurate clothing based on the design goals.