Also known as: ヘイロー忘れ
When a character who normally has a Halo is depicted without one.
The halo must not be present in the image, otherwise use the tag Halo Removed if it is present but not on the character's head.
In Blue Archive, this happens intentionally when a character is Sleeping or Unconscious. But most of the time, when the character isn't drawn with their halo it's simply because the artist forgot.