Kcharselect allows to select special characters from any fonts and put them into the clipboard
-rwxr-xr-x 1 root root 47848 sep 28 03:18 /usr/bin/kcharselect -rw-r--r-- 1 root root 430 sep 28 03:18 /usr/lib/menu/kdeutils-kcharselect -rw-r--r-- 1 root root 3176 sep 28 03:17 /usr/share/applications/kde/KCharSelect.desktop drwxr-xr-x 2 root root 0 sep 28 03:17 /usr/share/doc/HTML/en/kcharselect lrwxrwxrwx 1 root root 29 sep 28 03:17 /usr/share/doc/HTML/en/kcharselect/common -> /usr/share/doc/HTML/en/common -rw-r--r-- 1 root root 1780 sep 28 03:09 /usr/share/doc/HTML/en/kcharselect/index.cache.bz2 -rw-r--r-- 1 root root 1465 aoû 31 03:30 /usr/share/doc/HTML/en/kcharselect/index.docbook -rw-r--r-- 1 root root 325 aoû 31 03:30 /usr/share/icons/crystalsvg/16x16/apps/kcharselect.png -rw-r--r-- 1 root root 1353 aoû 31 03:30 /usr/share/icons/crystalsvg/48x48/apps/kcharselect.png