The main characters are not seen often, as they are working behind the scenes. I wish they expanded more on their motivations and history. The way they are referred to by nouns rather by names gives an idea how they are not the main focus.
The two main characters are fairly quirky. The Hero is positively overpowered, but doesn't think much of it and only uses his powers when appropriate. The Demon King is the leader of the demons, but contrary to expectations of the in-world characters, is selfless and deeply humanitarian.
The main character duo have a heart-warming chemistry, i wish they had shown more of them together, the light-heartedness is what drawn me in at first but it was pretty lacking in all but the few first episodes as they went their separate ways for errands.
The side-characters felt mostly forgettable. It's part of the narrative style of only touching superficially characters, as the focus is more on the story than the characters.
The art & sound were adequate.
I felt like there was a lack of information in some parts, and superfluous details in other places. So at times it was difficult to follow and stay engaged, especially when the main characters are so rarely seen. To be fair, some things are going to be left out when trying to fit a novel into 12 episodes, and it's a short enough anime to be watched for it's novelty.
