It's the sudden yell that interrupts her concentration on her spell. Great, now one of her spells were wasted and she would have to re-cast. There's a moment of irritation where she's grumbling this to herself internally, but a more important thought crosses her mind - someone yelling out to them either means a survivor, or a threat.

Ena whirls around to face the voice. She immediately places her hand on the ornate rapier at her hip in preparedness, and frowns. Sure, he doesn't look immediately like a threat, but a random person showing up in a scene like this...? She studies him briefly before asking, "What?"