A new kind of IO Personnel of some sort, Spire Guardians, are stationed at Guardian Towers across the map. Evidence of their link to the IO is from a Quest where a guardian will drop an amulet with the IO logo upon death.
A superhero who can grow to the size of a skyscraper and shrink to the size of an ant at will.
It is theorized that Enforcers are another type of I.O Guards (Troopers) who work for the Imagined Order. This is concluded from the role of the Enforcers being similar to the guards, both being used to patrol and police reality in order to maintain order.
It is theorized that the group has a negative relationship with The Seven, as speculated from a females phone call to John Jones in the Chapter 2: Season 5 trailer.
The group seems to be behind The Device event from the start, but the consequences of it on The Loop and the Water Wall were totally unplanned, and for some reason the top secret files concerning Midas, Jules & Lynx were on John Jones' desk, maybe because they are the ones who greatly participated in the implementation of The Device project.
There appears to be a connection between E.G.O / Ghost and the Imagined Order, since a painting representing The Agency is visible in The Office of IO. Additionally, John Jones' files as well as his mug have the E.G.O logo, as well as the entire office's aesthetic being reminiscent of E.G.O. (link confirmed by Bunker Jonesy in week 9 of the challenges of season 5, that confirms that E.G.O and The Imagined Order work together.)
The crash of the E.G.O member's plane was intentionally done. IO & E.G.O wanted to hide information (according to Bunker Jonesy)
The IO Guards specifically have a grenade emblem on their chest, which is one of the many symbols on the Imagined Order Logo. On this same logo appear 5 other emblems, suggesting up to 5 other ranks or units that are under the jurisdiction of the Imagined Order.
Their logo can be seen in the background in the Battle Pass screen in the lobby.