When I read this article I can see where your "flawed" ideas about medieval Bohemia came from. I don't mean it as insult or such just let me try to explain where problems are.
1) Castles - your vision of Bohemian castle obviously much differ from reality and its probably caused by language barrier. When most castles in France, Italy or Spain looked like you described, most Bohemian castle (including both in KC:D, where second was ruin) were more mere keeps with less then 50, 40 inhabitants. In 15th century there were less then 10 castles in whole including one in capital Prague with noblemen rich enough to have court or sponsor artisans.
2) Women - first problem with woman as main character start with main setting as blacksmith. Smithery was very lucrative business in this era and was bound by strict guild laws - and one of them was no women. Romantic idea about daughter helping h father and becoming smith is nowadays fantasy. In this era you need permission of guild to become apprentice, then study about 7 years and then again got permission for own smith shop. Try it different and live elsewhere then deep border woods and mountains and you would most probably end with broken hands and fingers because crippling injuries were popular solution of freelancer problems in guild sphere of influence.
In fact there is only one case when woman can become blacksmith - when she was widow of blacksmith and it was temporally till next marriage, first adult son or acknowledging of apprentice of deceased smith.
3) Ethnicity in central Bohemia - except Jews and Gypsies there were none.
Bohemia was only nation in central Europe spared of raiders invasion from Asia. Mongols in 13th century literally stopped at Bohemia doorstep after plundering Poland and Hungary because Genghis Khan died month before planned invasion and immediately Mongols returned to Central Asia to fight for khan title. All later Asians settlement were founded hundreds of kilometers further on east and southeast.
And when people with dark skin were quite common in southern Europe, France and England, in central Bohemia were extremely rare and only as visitors. Reasons are simple
- Bohemia region never was destination for African slaves, in fact it was major source of Slavic slaves till 12th century.
- Bohemia had no access to sea so it didn't participate in colonialism.
- Bohemia had no direct trade route to Middle East and Africa. Goods from these region arrived to southern Europe, then to France or Vienna and than, accompanied by French and German trader, to Bohemia.
In fact first written evidence about man with black skin came from year 1467 (sixty years after KC:D). It was two Portuguese slaves, gift from Portuguese king to Czech emissary Lev z Rožmitálu. And in this journal was even written dialog between P. king and Lev about "Moors" in Bohemia because king was surprised by Lev request of such cheap present (hundreds of thousand slaves came through Portugal these days). And Lev said : "There are none and we rarely saw them."
Ufff.... this a HUGE wall of text, I know, but I hope it help to understand how diffident was situation in central Bohemia against Southern Europe and France which are today often presented as model of ethnic diversity for whole Europe.