I, and many people I know divide their friend's list by school color.
Red - Fire
Blue - Ice
Yellow - Myth
Orange - Balance
Green - Life
Purple ~ Purple fits both death and storm, but it fits storm better. A grey star/jewel emote would allow us to have a choice for death school. It could also have utility in using it to display inactive characters/friends (if you aren't dividing by school.)
Please consider this addition as it would be a small change that could make a huge change to people's the way people personalize their friend's lists.