MindFocus is a mascot on X Window System. Lovely(*) characters stay on top of the focus window.
(*) Your favorite character(s) can do (Not only lovely ones :-) ).
If you can read Japanese, check Author's page for more information.
/etc/apt/sources.list
deb http://www.asahi-net.or.jp/~AE5T-KSN/lib/mf/ potato/
Add this line to /etc/apt/sources.list
and do 'apt-get source mindfocus'.
deb-src http://www.asahi-net.or.jp/~AE5T-KSN/lib/mf/ potato/
% mindfocus
If you want play other '.mfc' files, then
% mindfocus akane.mfc % mindfocus misaki.mfc etc.