Jeritza is a playable character from Fire Emblem: Three Houses and Fire Emblem Warriors: Three Hopes. He is a teacher at the Officers Academy who is in charge of armed combat training, and the tertiary antagonist of Cindered Shadows. He possesses a Minor Crest of Lamine and is 21 years old at the start of the game.

He might just be the Death Knight. Not sure though.

Oh well, deploy the Lysithea.