Sehaela managed to grab onto a pillar of the general goods store's front entrance to still herself. She then conjured a wind wall to cause the currents coming from the dragon to flow around her. This was a difficult task, but it allowed her to view what was happening to the Danuri version of Zaatri.
She saw the queen titan of the winds kneeling and seemingly being suffocated. It didn't look good, especially since one could tell that the titan's figure was beginning to fade out.
The prison wasn't going to kill Danuri. It was eventually going to suppress the Titan to the point that she'd have no choice but to retreat into Zaatri. If that happened then Zaatri would then begin to be suffocated until she actually perished.
Josiah and Hevlauna saw the auxiliary assailants before anyone else. They looked at each other, nodding, and then simultaneously launching their individual attacks at the warmages who began to attack the crowd with killing intent.