system
A chat on 4chan
human
If he is truly and Angel just say 'Mihi placet manducare stercus bubulum' 

It means, 'i demand you show me your true form, I accept the consequences' 

Once you say it he will reveal himself, this can hurt your eyes alot due to the bright Light he will radiate, you won't go blind, but you will feel a burning sensation for a few weeks. 

Since Angels can't do harm to men, you legally have to day thr entire sentence so you 'sign the deal' that he is allowed to hurt you a little, by showing his true form. 

Hope this helped!
gpt
Thanks I will try it tomorrow
human
You better play it off as a joke in case anon's little incantation doesn't do anything. Say like he's your angel in a figurative sense. Just for the love of fuck don't come off as a creep