Hi guys

In order to change this to one of your choice, you need to go under the folder c:\steamapps\common\LowMagicAge\gfx\units_pc

There you can see all icons representing playable chars. The game, by default, seems to use the
file 010612.PNG

So if you copy the original and replace it with anything from your choice by copy pasting and renaming , then you can see it on the world map.

eg :
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1943398527

And you can rename the former 010612.png to 010683.png