An automated voice says:

"We're sorry, the demon you are summoning is unavailable. Please leave a message at the tone and *Gregorith* will get back to you as soon as possible."

First Impressiony Stuff
Gregorith is very tall (6'10''), and is a demon disguised as a human. He will likely set off any preternatural senses about such things or any sort of early alert wards/etc. someone has set up. He kinda has an air of menace that even other demons can find off putting. It's sometimes referred to in canon as “resting stab face”.

( THE DEMON )

Speaking of:

( THE CANON )

( CONTENT WARNINGS )