The Round Room

This room, known to Organization members as The Round Room, and inaccessible by any means other than by corridors of darkness, is a circular room containing throne-like chairs ranging in height, where the Nobodies of Organization XIII can gather and discuss developments and for Xemnas to give out orders. There are thirteen throne-like chairs that are rather tall in height, each occupied by a member of the Organization.

Tetsuya Nomura himself has stated in an interview that the height of each throne is just a gameplay mechanic.
-During the meetings, the members of Organization XIII are sitting in chairs. Is the height of these chairs determined by things like their skills and abilities?
Nomura: No, the height of the chairs is not fixated, they move. That is to say, the height is up to each person. The leader, Xemnas, is always the highest and to be at the same height as him would have a pretty bad feeling, so the other members wouldn't do that. (laughs)
The seats are arranged in a circle with Xemnas at the prominent seat. At Xemnas's left are the odd numbered members, and to his right are the even numbered members, increasing in numerical value up until number 13, Roxas's seat, which is across from Xemnas's. The "fourteenth member", Xion, has no throne as she was neither a true member nor even a real Nobody, but a replica, meant to fuse with Roxas, thus the reason for the group's name remaining as "Organization XIII".

Michizaxia stepped into the dark corridor, striding briskly towards the Round Room with a rush going down her spine. Something important was happening, that's what she'd figured out.

*Dark corridor appears, Siki steps out of it*
"Hmm? No one is here yet......"Siki said looking around to see if anyone she knew was here yet, she looked at the ground below her, "ekk....that's high....."

A young man, appearing to be in his late teens, appeared in the tallest seat of the room.
"Welcome to the Round Room" He said softly. He jumped down and landed in front of the center table.
"Everyone stand around the table" He said. "I'm going to be giving you your numbers in rank"

Siki jumped down to the table as well, "alright! Lets get this over with shall we!"Siki said excited, by this, she looked at the young man, then to the girl, she started to wonder how they were like.

Michizaxia kept her lips sealed, stepping over to the table. Her deep-cast blue eyes flickered from the people around her.

Nolex looked at the two girls.
"Ok, here are your ranks" He said. He pointed at Michizaxia, "your number is #10, and Siki, your number is #5"
He looked at them. "I hope you like your numbers" He said. "They were all picked at random"
He sighed.
"We have one more thats supposed to show up, but, I don't knwo when that'll be so, shall we go scope out an area?" He asked.

Siki smiled, "I like my number....it's my lucky number, but then again...who needs luck?"Siki said with amusement, she thought about it for a second then nodded to searching an area.

"Shall we go to Twilight Town?" He asked.

"Twilight Town....I think that would sound fun....lets go and see what we can find there"Siki said with a smile.

Michizaxia shut her eyes, slightly surprised at the low number. Either way, she knew it was random, so there was nothing to complain about.

Nolex looked up as a dark corridor opened in front of him. On the other side, Twilight Town could be seen.
"Lets go" He said. He disappeared through the corridor.

Siki followed closely behind, she looked back and Michizaxia, "come now....lets get going...."she said before going through.