Ryu: Will likely be involved with putting out the fire and fixing up anyone injured with his magic. If he manages to trace it back to Lucifer, he may attempt to throw down. If that were to happen, it's probably one of the few times the city would get a glimpse of his Kaiser Dragon.

Merlin: Will also likely try to help with the fire, but he'll likely be trying to find out afterwards who ddi it, or why.