Their account names are always left empty, so they're only known as "Blank"
This article is referring to something that does not have an official name. It is a fan-given name for the substitute lack-thereof, the name is either an alias, surname or nickname. You can help No Game No Life Wiki by expanding it!
The Elderly Official is an unnamed high ranking official. He was in charge of the coronation of Imanity's new king, and present for most of the important occasions in Elchea.
During Kuhaku's coronation, he mistook that the Ten Pledges required there to only be a single representative for each race, resulting in Sora and Shiro's fight over the throne through very many games of 'Old maid' (winning condition: two wins in a row), which ended in a tie.
He bears strong resemblance to the judge from Ace Attorney series. This is also made clear in Episode 3, when the "objection" speech bubble that pops up is the same as is shown in Ace Attorney.