This my own original world! ((I got the PFP from Google)) If you want lore, here you go!

(BTW, this is a very, VERY brief examination)
10 years ago, the royal family, eldest son: Ash- youngest son: Zane- Only Daughter: Kyo- were split as Kyo was thought to be a witch after communicating with demons and formed blood pacts with powerful creatures and Ash drove her out of the kingdom. Riddled with fear and hatred, Ash got ready to attack- and so did Kyo. A massive battle ensued as Kyo brought out a colossal dragon to take revenge. Ash eventually sealed her into the shadow realm. Eventually her hatred seeped out, creating monsters. And now it's just the average isekai anime.