I love the ombre affect on the gown of this Angel of Darkness costume. This deluxe costume includes the headband, halo, gloves, wings, and choker. It’s also available on Amazon.
For an angel costume that’s a bit more morbid, here’s the Angel of Death Grim Reaper costume.
This costume is called Kiss of Darkness.
This Damsel of Darkness costume portrays a fallen angel. This costume is also available on Amazon.