Pereth (sometimes known as Peres) is a boss character from Fire Emblem: The Binding Blade. He serves as Murdock's lieutenant after Galle is promoted to Dragon General. He is the boss of Chapter 21x: The Silencing Darkness in Fire Emblem: The Binding Blade. He is protecting Bramimond's ancient Dark tome, Apocalypse and waiting to ambush Roy and his army deep inside the Shrine of Seals. Pereth's in-game description says he attained the rank of general in Bern's army despite serving as Murdock's lieutenant. Pereth appears in Chapter 21 if you fail to access Chapter 21x (he has the same stats and equipment, but is Level 15 instead of Level 17).
—Pereth's death quote in The Binding Blade.