St. Peter tells us, “Be sober, be watchful. Your adversary the devil prowls around like a roaring lion, seeking some one to devour” (1 Peter 5:8). St. Paul writes: “For we are not contending against flesh and blood, but against the principalities, against the powers, against the world rulers of this present darkness, against the spiritual hosts of wickedness in the heavenly places” (Ephesians 6:12).
Never fight a demon or demons alone. Without God, you will lose.