Character from Fire Emblem: Three Houses.
A Teacher in the Office Academy at Garreg Mach Monastery, in charge of armed combat training, his specialty being swords and lances.
He's also the Death Knight (Fire Emblem), the dreaded Skull-Masked knight, and his actual loyalty belongs to the Adrestian Empire.
He was born as Emile von Bartels, and is Mercedes's half-brother.