POST-TRAUMATIC STRESS
This is for anyone with any kind of trauma that has impacted them in some way.
Maybe it keeps them up at night, maybe it drives and motivates their every move, or maybe they have it under control until it's triggered. It needn't be an earth-shattering event (though it can also be those!), but everyone attending this group will have something in their past that troubles them in some significant way.
They could have survivor's guilt, they could tell everyone they've ever met about the event in an effort to try and purge it, or they'd rather avoid facing what happened to them at any and all costs.
I'm open to suggestions, but I'll be happy to handle the mingle details if no one wants anything particular.