This is the picture that inspired the character Graye.

I, as a player, enjoyed Graye greatly. Bungle always wanted to
smack him due to his unbelievably cryptic way of talking.
He was around for a long time and some characters
considered him to be almost immortal.

In fact when Bungle first started Solidus said
"Gangs come and go, Corps rise and fall, Graye remains."

Graye later told Bungle
"No one remains in the city. Only the city remains."

Looks like he was right:
Log Of The Death Of Graye