Angels are enemy Nordics (the enemy gods). They only want the utter destruction of mankind. Weaker angels however are just strong thought forms. I assume that angels look just like father and his demons except they are not on our side. I have no idea how u would kill a proper angel but it is safe to assume that if you are powerful enough, you can use your visualizations as a tool to cause harm to them and eventually kill them in the astral.
