Recently one of my friends made some skill icons for GBAFE, which can be used and edited freely. No permission or credit needed. Because he doesn’t has an account here, so I asked for his permission and posted them here.
They are designed to display in the bottom of the personal data window, like this:
http://ngmansion.webcrow.jp/wp/wp-content/uploads/2015/09/holper.png
If someone need other skill icons, he is willing to have a try.