The Gilt Sky, Outskirts of the Roellia System, 999 M41
The primary briefing room of The Gilt Sky had seen its share of illustrious guests over the long and glorious history of House Orthesian but it had been quite a while since the current patriarch had entertained guests of this degree. Colonel of the celebrated Kreig, Explorator of the Adeptus Mechanicus, and even a Captain of Emperor's Angels had graced the ship's interior. There was also another in the room, the governor of Roellia himself, not there physically, but projected via the room's immense holo-projector. The slight crackle of burning incense and the guttural chantings of the scurrying tech-adepts broke were the only things that broke the intense silence as the various leaders viewed each other. All of them had come to this system for different reasons: Orders, duty, relics, profit but all four of them were united in the fact they were not enemies and wished to stay that way. For now anyway.
The governor himself was perhaps the only person in the room who seemed nervous even if there was no way for these luminaries to harm him. He reflexively straightened his overly-pressed uniform, ordered his personal servitor to wipe accumulating sweat from his brow, and just kept fidgeting, the lack of talk unnerving him. He didn't want this many militants here since inevitably that would lead to his beloved planet swiftly conquered and exploited but simply put he had no choice when he sent out the request for aide. Orks in the jungle, rumors of xeno activity on Aurelia, Tau, and most troublingly mention of worshipers of the Ruinous Powers. There was no choice but to request the Imperium's aid and with luck all sides would be too busy killing each other to properly wrest control. At least it would buy him time, time enough to find a way to get rid of all the invaders and leave him and his family to govern their world in peace as they had for generations.
This scene is for the Imperial commanders to discuss the goings on and plans for the future. You're all vaguely aware of the threats that are on the planet as well the governor's request for aid which at a minimum alerted you to the planet's presence (barring the Kreig who were ordered to protect it independently). Now, the other factions may be aware of this meeting if they want to and attempt to gatecrash via hijacking the projector/warp sorcery or similar. For now though I'll let Echo start the negotiations.