devtrackers.gg
They're you.
I believe Scout (the one in the middle) is the default starting character look.
They're Monroy's Outriders. They dropped, got most of their squad wiped by the anomaly, and Monroy abandoned them to land somewhere else. They stopped aging when they became Altered. Now they have no faith in people and avoid them like the plague. They kill beasts because everything has turned bad over the years and they don't know why. That's my headcanon and I'm stickin with it.
I like this headcanon.