SO SORRY IS PROBABLY A FRIEND OF GASTER; ELABORATE; BEFORE THE WRONG NUMBER SONG THE PERSON AT THE PHONE ASKS TO TALK TO G WICH COULD PROBABLY BE GASTED; AND THE SONG SAYS "I'M SO SORRY THIS IS THE WRONG NUMBER" SO THIS MEANS THAT SO SORRY COULD BE THE ONE AT THE PHONE; (IDK HOW AZRIEL WOULD REACT SO I'L JUST LEAVE IT BLANK)