Hi Carcons.
In my opinion, you can use different styles in my tilesets.
The two characters on the left are from low/cub3 8D Character Editor (expensive but worth it).
The third character (simple pixelart) was created by me for a game.
The fourth is the standard sprite from RPGMaker.
It is important, however, to decide on one character and not to mix them.
I can totally understand the problem with the missing characters and am also thinking about
whether I should still produce characters.
It is very time-consuming, especially if you animate more than 4 different directions.