That. Was. Cool.
Really. I liked than MA elf, but it was more or less normal martial artist, just with magic. But now we even got someone with different anatomy without any magic.
Would be much better just tell to hunters, prince and brother, so they secretly find evidence and capture him. As they know, that Lia too smart for normal toddle, they would believe her. Now he would be more cautious.
But well, that was epic.
Duke look like a stereotypical russian peasant from Turgenev's short stories. Redneck just returned from field to drink some kvas... And in previous chapters he resembled scottish highlander
For high ranking noble his design quite unique.
Not watched, but as LN reader can say. Manga follow main plot, but changed or added some minor details. While anime adaptations of any LN usually not changed anything, but can skip some details.
Not really. Dark magic, space magic and several others work literaly same as magic outside of D'system. Mana by itself and way to use basically same for god's and ordinary people.
It look like Okina made retcon, and now Kumo used magic in the past with skill Wisdom. But actually Wisdom just give her explanation how to do it.
And even if we accept that, actually, Ariel can just buy her book about magic. That was how her classmates learning.