@MinGenius while you're right, it fits them, both are still really young and had a sheltered live until recently, they are not stupid, they have just very little experience in life and are generally kind-hearted and especially our spirit king has simply little knowledge about his powers while Lapis is a true powerful dragon, grown up and educated as a dragon, centuries old, always curious, always trying things out
I have to say I like this show for its natural characters
El, who is curious about his new world, so he likes to explore it and learns only piece for piece about his vast power and has still the mindset of young adult human (not like so many isekaied mc who in mere weeks adjust to a completely new world and their vast power regardless how mediocre or even idiotic they were before)
Isana, who tries his best to become a good emperor, but has (logically) still so much to learn about leadership, his empire, the citizens and the course of the world
Lapis, who is their opposite, calm, smart, knowledgeable, powerful, yet not cruel or unable to feel empathy
and the other characters are well written too imo