Right... he's injured. All Ignis can do right now is just stare at him and wonder how did he come back. Was he revived at the church? But- he'd come back to the house where they all live and wouldn't be on the Ferry with new arrivals. Nothing makes sense and Ignis can't put it into words- he doesn't want overload Prompto with new information so suddenly (especially the "you were already here" stuff).

"Yes... yes, I can see. I see you," Ignis nods, his eyes critically scanning all the cuts and bruises and Prompto's general state. No earth from being buried, or broken bones. Just wet clothes from being in the lake...

Prompto may have taken a step back, but Ignis steps forward again and wraps both of his hands around blond's shoulders, pulling him in a tight hug. He doesn't say anything and it will probably freak out Prompto but he just couldn't help himself.