When Kai teleported back to the battlefield, all he saw was destruction. Every single person that he remembered being there when he left was dead, except for a handful of them. He looked around for Saintess Celeste, whom he found, barely alive, and healed her back to full strength.
"K-Kai. You're back." She smiled. Celeste wasn't angry or upset at him, regardless of the circumstance. She suspected Kai had something that he considered more important to do and knew he would be back once it was handled.
"Sorry, I didn't come back in time." He smiled wryly.
"I-It's fine. B-But the demon king, h-he's destroying the c-capital. Please help them."
He turned around, sensing the demon king's presence in Vaudrille. It was hard to miss with all of the negative energy radiating in the air.
Kai healed everyone on the battlefield, dead or alive. Some people managed to come back to life as they had enough vigor left in them, but others weren't so lucky, including the hero himself.
