It was an early concept for MetroMind. You can see some elements of that character folded into the Greeter who takes the Gospel from you and the court reporter in Arbiter's courtroom. Ultimately, we thought this design, while really cool, had a few distracting elements (the Noh-Face from Spirited Way mask, too anthropomorphic for an AI focused on progressing past man). I have some vague recollection that behind that curtain might have been some human brains or something, at some point I had toyed with that idea for MetroMind, but we discarded it.