Glasya

Saw him mentioned on /x/ and looked him up. Very complex sigil which indicates a high and wise demon. Said to be a master of murderers and teacher of science as well as knower of everything.

Images show him as a flying dog with wings. What I got was a black beast person with a red pentagram in the forehead. (and wings) 

The interaction was very straightforward.

> What do you want?
> What is the offering?

Then sealing of a contract. So far the nicest demon I've met. He said he doesn't want to be called "nice" but that it's fine in this context. Very cute, really.

Explained a lot of things to me in detail, combination of sarcasm and irony involved to make me reconsider different notions.