Inktober 2: Noisy
Brushpen + grey markers again.
Okay, so I was looking for Coran’s eye color (because I couldn’t remember it) and then I started to look at the list of occupations:

Look at this! LOOK AT THIS! This man has a full plate on his hands. He’s so important and pretty much the key to getting the paladins as far as they have in being true paladins.
He’s been Royal Adviser for a while so there’s no doubt he’s got experience with knowing how to get a kingdom/empire to stay functional and diplomatically handle situations. He’s experienced in advising people on what they should do in tight situations.
Mechanical Engineer. He’s the one that keeps the ship up and running (later with the help of Hunk and Pidge I don’t doubt and I have no doubt he teaches them how things work when they have questions or seem to struggle with something).
Helmsman of the Castle of Lions. He can fly not just the Castle, but probably anything he gets thrown into and if he doesn’t know he’ll probably learn quick, fast, and in a hurry.
Part-time chief for the Team Voltron. Okay so his cooking skills are probably a 50/50 on it being actually tasty to humans (and sometimes even Alteans), but I’m pretty sure he’s been to war and had to make do with what he had to feed not just himself, but probably a platoon.

Chief Medical Officer. This means when the paladins get hurt, he’s taking care of it with or without the help of another. After everything was said and done, he was probably the main one to take care of Lance’s wounds after being seriously injured when the Rover imposter blew up.
Chief Trainer. He was probably part of the military force of Altea so he’s probably experienced in training others to fight in the first place. This is how he probably knows how to train the paladins. Also because of this experience (and probably experience interacting with the former paladins) he has initial doubt because these are just children and they seem to have no experience in fighting (save for Shiro and maybe Keith).

He knows nothing about their capabilities so of course he has doubts if they can make it as paladins, but as he learns more about them, he gets better at training them and finding methods to help them grow in their roles.
We’re gonna keep going with the fighting expertise. We see how he gets in a defensive stance when Pidge yells at Allura.

See how he turns his body? He’s ready to lunge to her defense at a moments notice if any of the paladins take a turn for the worse and attack her. And what happens when the food get’s thrown at her? He shows fighting experience and blocks the food so that not only she is protected, but himself so he can keep defending her should the need arise (despite it not being fatal to get food on his clothes
Even on the wikia it says “The eyes of a man who’s seen far, far too much pain in his lifetime.”
Look at his face:


Those are the eyes of someone that’s seen too much pain in his lifetime. As I’ve previously stated: there’s a high probability he’s been to war and that’s a lot of pain and suffering.
Teacher of the paladins. Trainer and teacher are two completely different things. While yes, trainers teach, they merely train a certain aspect. As a teacher he gives life lessons and gives them guidance. As a teacher he cares about his students as we see here:


When Lance is homesick he comforts him as best he can. He understands because he’s homesick, too (the only difference being he can never go back to his home because it was destroyed).
He teaches them lessons about things they had no prior knowledge of.

Hunk doesn’t know that the Balmera is a living thing or why they shouldn’t yank the crystals out of the earth, but Coran doesn’t yell at him over not knowing or get frustrated. He calmly explains, “It’s not a planet. Balmera are ancient animals. Petrified, but still alive. Their bodies naturally create the crystals that help power many Altean ships. I often accompanied my grandfather to visit these majestic creatures when he was building the Castle of Lions.”
Long story short, give this man some love because he’s so underappreciated.