Sigma

Look at how sharp it is. It's basically a jagged 'E' that could cut your finger if you touch it.

Sigma demands you to do the same task over and over again. It's the micromanager of mathematics. "Add this! Then add it again! Then do it 100 more times!"

It's loud. It's aggressive. It takes up too much vertical space. It's trying to act cool by using a Greek letter, but we know it's just a glorified To-Do list that never ends.