The Wardens were the Arch Demon's more elite ground forces. Tough as nails and fiercely loyal, these insect-like warriors were created by Umbrella, made to have increased strength, stamina and health. They are almost impossible to kill without careful co-ordination and planning.
They're generally not a common sight, but in restricted areas and those the Arch Demon does not wish others to see, they are a common sight, often roving in packs in such an area.
They have the intelligence to wield many different weapons and are equipped by the Arch Demon himself.