[Sorry for being even tinier than your sister, Yang. He doesn't quite wriggle out of her grasp but it's clear he's still trying to move because this cannot wait.]

Tadashi. [Does she know who Tadashi is? He doesn't know, maybe that's not important. His hand waves toward where the village it where the remnants of the fire are.] I don't know what happened but there was an explosion and flammable monsters destroyed everything in the village. A lot of people got hurt and I went to see what happened and Tadashi wasn't waking up. [There's a pause.] His burns and the smoke inhalation were too much for him…his body disappeared a few hours ago and I have to find where they sent it so I can make sure he comes back this time.

[This time. It's not explaining everything, but it's a start.]