Yes, Satan and the evil spirits of false teachers and prophets can appear to be good but in reality are pure evil. It is called diabolical disorientation. They prowl around the world to ruin souls.
Many call themselves "brothers ", "priests", sisters, lay mystics. etc and lose their souls to greed and vanity. They try to trap others with false piety. They use religion to profit and live a lifestyle of the rich. Often they use their greed for sodomy and sins of flesh. They lead souls to Hell.