Angel Watcher Purpose Is Divine Intervention:

Mathew 13:49: "So it will at the end of the age, the angels will come forth and take out the wicked from the righteous.”

Exo 32:34: "Now go, lead the people to the place I spoke of, and my angel will go before you. However, when the time comes for me to punish, I will punish them for their sin."

Mar 8:38: "If anyone is ashamed of me and my words in this adulterous and sinful generation, the Son of Man will be ashamed of him when he comes in his Father’s glory with the holy angels." 

Psalm 91:11"For he will command his angels concerning you to guard you in all your ways."