Flame Emperor

"I'll let them roam free for a bit longer. I don't have enough information about that teacher."

The Flame Emperor is a character from Fire Emblem: Three Houses.

Profile
The Flame Emperor is a mysterious being operating secretly around Garreg Mach Monastery. Their emotions are impossible to discern through that mask, but it's clear that they're not friendly towards the Church of Seiros. They, for some reason, employed bandits to attack students who were out camping, but that failed due to Byleth's intervention. After that, they have come to hold interest towards Byleth while also staying cautious.