The opening cleverly tells Lloyd and Shoma's personalities
Lloyd's kneeling position and sunlight shining upon him shows the boy's humbleness and heroic nature, that his only purpose is to serve the greater good.
Shoma facing away from the dragon shows not only how he doesn't fear the creature but also him turning a blind eye away from the dangers this thing would posed to others.
Why does Marie have absolutely no cleaning or cooking skills despite living by herself? She was a Princess up till 5 years ago, she's always had an army of servants that did all of that for her. It's only made more prominent because a fellow former noble Selen was forced to munch on dry rice grains as she didn't even know how to buy things with money.
Why is Chrome's food so-so and his cafeteria in a constant state of mess and greasiness before Lloyd came into the picture? It was always just a cover so he could stay in the city and monitor the officer's academy and the army to help Marie with her investigation into the King's mysterious changes in behavior. If he took the teaching position, not only would he have little time to dedicate to keeping tabs on people, but he'd also be highly visible.
Episode 10 reveals that Phyllo's martial art belongs to Pyrid. That's why Lloyd is unsurprised by Phyllo's previous attack: because he had already seen that style as an aerobic exercise routine. Even then, he is shown to have some trouble against it, which only adds to the feeling that he is weak.