There are profile pictures displayed next to team members' name in various places. PoeticMetric uses Gravatar for fetching people's avatars.
Gravatar (Globally Recognized Avatar) is a free service provided by Automattic (the company behind the WordPress).
So, if you want to use a custom profile picture on PoeticMetric, you can go to Gravatar, and set an avatar with the e-mail address you use on PoeticMetric there. Your profile picture on PoeticMetric will automatically be updated.