The way of addressing in this world is the same as in Earth Mistake World and the Akasha continent, with the first name followed by the last name, not vice versa.
Therefore, in these worlds, where people are not very familiar with each other and have no close relationships, they usually use the last name followed by a title to address someone, rather than calling them by their first name directly.
Gejiev, Brian, and everyone in "Brilliant" addressed Reiger by the last name "Brilliant," and others did the same to show respect.
In this world, the only person who would address Reiger by his first name was Ainz, who came from the present world, originally a person from the island nation, and still retained the habit of putting the last name first when he first arrived in this world.
Given that, there was no need to think about who the visitor was anymore.
It was none other than the ruler of the Nasalik Underground Tomb, Ainz Ooal Gown.
"It has indeed been a long time, Lord Reiger."
