Guardian Spire, also known as Arcadia Spire, is the location from which MGs, Magical Soldiers, the police, and everyone else is coordinated. Whether the people there have command authority over MGs is not clear; it sort of does and sort of doesn't.
It is the tallest building in Arcadia, and also fairly wide. However, it is much larger on the inside, having many rooms that have been expanded using spacial magic. (ch. 36)
This is where Error Machina works from.
“The Arcadia Spire was directly in the center of the city also made orienting yourself simple, the skyscraper of smooth angles, glass, and helipads standing out with a distinctly futuristic architecture.” ch 34.
A major internal feature we have seen is a large room that looks like a space mission control center, with a lot of people in front of computer monitors and a giant screen in front of the room. ch 25.
The tavern on the tenth floor is designed to look like an adventurer's guild. (ch. 36)
Partial Directory:
Arcadia Spire: General Guardian Floors:
Tier One and Tier Two Guardian Floors
Floor 10: Lobby, Tavern, and Request Hall
Floor 11: Storage Rooms
Floor 12: Workout Areas
Floor 13: Training Rooms
Floor 14: Guardian Shops
Floor 15: Recreational Zone (Computer Rooms, VR Stations, Arcade, TTRPG Rooms, etc.)
Floor 16: Sleep Rooms
Tier Three and Tier Four Guardian Floors
Floors 20 through 26 follow the same pattern.
Tier Five and Tier Six Guardian Floors
Floors 30 through 36 follow the same pattern.
Other Floors of Interest
Floors -11 through -20 are Currently Restricted
Floor -5: MG Garage
Floor 1: Spire Reception
Floors 40-45: Grand Library
Floor 50-55: Operator Control Rooms]
In earlier editions of the story, known as Guardian Command spire, changed to simply Guardian Spire.
Mika stated that Guardian Spire and Arcadia Spire are the same thing on discord mgg-general, 9/13/2024 10:43 PM.