Headcanons: What I think they would look like if they were humans (Ratchet,Optimus, Smokescreen)
Height: Average. Not the shortest, but also not the tallest
Hair: Something like a long bob, or a little shorter. It usually looks a bit messy, with strands sticking out slightly, because due to his busy life, he generally doesn't care what his hair looks like. He often ties it up in a ponytail or a funny 'palm tree' (top knot). Sometimes you can see colored hair clips that Miko put on him, and he forgot to take them off. He cuts the hair of the whole team, as they say he has the most skilled hands
Body: Since he is more of a scientist than a warrior, I don't think he would have an ultra-athletic build. But I also wouldn't say I imagine him as frail. He is a broad man in a good way, with a wide waist, large hips, and broad shoulders
1: He has very visible veins on his arms.
2: Wears glasses. Not on a permanent basis, but only when he's working with the computer for too long and his eyes getting tired.
3: Noticeable hair on his arms and chest.
4: Small burns on his hands due to some unsuccessful chemical experiments
Height: The tallest in the team (did anyone doubt it?)
Hair: Short-cut. Long hair would get in the way on the battlefield
Body: Ooh, he's a powerful man. With strong arms and back. His body type is an inverted triangle, with broad shoulders, a large chest, and not very wide waist
Distinctive Features: He has several large, old scars acquired during the war. To any worries about this, he responds that what's done is done, these scars are now just history, and they don't hurt at all, so everything is fine and they don't have to worry about him
Smokescreen (my favourite lovely boy!!)
Height: A little above average
Hair: Short and messy. The hair constantly gets in his eyes, as it is very choppily cut, because Smokescreen tried to do it himself to look cool. As a result, he decided not to correct it, because, by his own words, itβs even more stylish and interesting like this, unique in its own way
Body: Athletic, but not very muscular. He is more quick and agile than strong, although honestly, one doesn't hinder the other. He would have a very pronounced pelvic line (or hip line,i don't know how to call it correctly,hope you get what i mean)
Distinctive Features: He would have a lot of small scratches scattered all over his body, obtained due to his impulsive desire to rush into hell itself. Ratchet makes him put on plasters (band-aids) to prevent infection, but they don't stay on him for long, as he is always running off somewhere