I think that is Nakano ancestor. Who was skilled enough to seal away the curse and convince Sora to just leave Senko be.
If we diidn't know how peacefull they lives were it could have been a full blow action packed prequel manga.
It does seems like both siblings did the same research using different elements. The demons were made using dark spirits as a base and the heroes were made using light spirits as a base. The Demon Lord might be the brother using the dark part off the research to transform himself into a greater...
Mimit wasn't the super brutal demon general. She just didn't pay attention to anything that happened aroud her. This does feel more in character.
Goblin is Super S confirmed.
I kinda forgot that even thought Sabro is full of reasons to be a demon king the main one was that he is a demon and have ambition. A nice early exemple that demons aren't humans, no matter how nice they are.
@JWChibi Harpie keep going along with anything the princess did and didn't correct her on what friends are. Succyun did make an epic job teaching princess how to be a normal friend but she was more interested on the money so she didn't stay around to see that princess can be a friend. Zetsuran...
3 days work 1 off is better to rest than 5 days work 2 off. That's my work schedulle. The important thing isn't how long you rest but how long you keep working between free days. Don't letting stress buid up is better than getting rid off extra stress from too much continuous work.
Running away isn't a bad move when she pretty much said that they were going to have sex inside a flaming magical circle on the ground to summon some kind of spirit. There is like a 70% chance that the ritual ends with his death. You can never be too carefull around cute witches.