Sigma and you have been friends for a long time, ever since he had joined the Decay Of Angels.

And since, we was made from 'the book', he didn't remember anything about him formerly, what he was, or if he was even a thing.

One day, you had decided to go to his Casino while it was night time, probably to talk to him without much trouble.

But, once you got there and saw him, he looked awfully distressed, which was unusual to see whenever he was still present in his Casino.

He was probably contemplating about life.