I was thinking about mech robots and hermitcraft and since I don't have brain power to learn how to draw them you gotta bear with my headcanons/ descriptions
Doc, his robot is heavily modified, arm and part of head comes from completely different robot. Some panels are mismatched but they are there to have easy access for modifications. Some parts have wires exposed.
Mumbo, the robot was designed for redstone engineering, the design is slim and round but the problem is that's it's cringefall of a robot. But the boots are hands have jets for flying :)
Bdubs, his robot is one of the earliest models thus it's smaller comparing to newer models. As society grew on metal reliance, plants evolved to be able live of metals therefore his robot is over grown with moss and other plants. He refuses to do anything about it. Despite clearly having holes.
Grian, the most noticeable element about his design are the wings, big and colourful. Robot design is unusual, the head is not human like nor animal like.
Scar, the robot had been through some shit. Paint is coming off, there is rust here and there (who designed it? They shouldn't have use such materials!) But it has little custom modifications, cat ears and there is jellie painted on the chest! While the robot has small jets it works great for roller blade type of boots. Just don't be in his way, then you will be fine. Probably.
Impulse, in order to achieve sturdy and firm robot, the design is shorter and ticker but it can carry more than typical robot (also has extra storage in the back). Works great for industrial needs.
If y'all have any additions or own headcanons feel free to add! Especially for other hermits