The cosplayers you see in the following photos are Sons of a Gun Cosplay(Hawke, Isabela), Ren Sinclair (Merrill) and Dark Incognito's Cassandra. The photos were taken by Anton Timofeev.
The cosplay even comes with a nice bit of backstory as well!
"After the battle with Nightmare in the Fade, Hawke leaves Skyhold to warn old friends that Corypheus is still alive and dangerous. He meets Merrill and Isabela in a cozy tavern like in the old days. Cassandra tracks them down and once again demands Hawke to join the Inquisition. But... they end up getting wasted.