Talk:Warframe Cosmetics/@comment-88.108.47.225-20150703142125/@comment-98.89.21.164-20150710224625

Frost's shoulders (or really upper arms) emit mist that matches energy color. Also, Ember has a constant stream of tiny little sparks (like what you see flying off a real life campfire) that always seem to fly up through her shoulders and past her head. Also one of Ash's arms has a very thin veil of smoke around it, I think his right arm but idr.

It could be any of those, or as others have mentioned, a badge or a piece of armor. The best way to tell is just look at where the particles are coming from and see if they're wearing a specific armor or badge, or else just see what frame they're playing.