(big "red flag" example: if you're having frequent dreams involving interaction with family or loved ones...those probably aren't your family and loved ones. Ask them, in Jesus' name, if they're demons. They'll give an honest answer)
And while it's very important to "know thine enemy", it's also important to be aware of your allies.
This dream encounter illustrates a case where an angel of the Lord correctly identified himself to me, according to I John 4:1. His subtle manner of glowing appearance also lines up with various passages in Scripture. A masquerading familiar spirit appeared shortly thereafter and attempted to disguise himself as this very angel; leading to an additional lesson on the more finer points in exercising discernment.
May this testimony be a help for you fellow spiritual warriors out there.
We're all going to be much, much needed in the short days ahead.