There's no two ways about it. He is in trouble and that is a fact. He put a layer of soul force around him because he can't rely on luck that no demon gods will have any designs for him after they sense his energy signature. Reality has proven his caution to be right and not to be overacting or baseless paranoia.
Other demon Kings can only feel a certain threat and a corrosive aura but demon gods are intimately familiar with his kind of energy. In fact, they are made of corrosive energy that will overwrite whatever it touches. So they will want to understand why he is the way he is and they will not be polite about it.
The guarantee of safety from WRATH can be subverted. After all, it is only a single demon God that invited them and made the Oat to protect them. There are 9 other demon gods here. Anything can happen so he protected himself.
A casual inspection of him will be very bad apart from the fact he has Chaos energy. They will also notice that this body doesn't contain a soul despite having a crown. That will make them realize that he is a king of kings. So they will want to get him at all costs. If they didn't know that he must be killed before, they would after a simple inspection.
The soul energy is not only to prevent scanning on him. It will also protect him and give him enough time so that he will have the opportunity to self-destruct before they can touch him or his energy. His main body will be able to escape through a portal in his plane.
So he didn't just wander into what can be compared to a lion's den without sufficient preparation. He has made sufficient preparations. It is funny that all his preparations are for him to be able to kill himself before it is too late.
He continued to rise above the sea unperturbed. He didn't show any indication that anything was amiss or that he sensed their scanning. What they have found out about him is not as bad as what he doesn't want them to find out so he is still in the clear. That can change at any moment but he must remain calm and collected.
Fortunately, his head doesn't have a face so his work has been cut in half. He doesn't have to school his face. He just made sure to keep his posture and body language regal. He mustn't look like prey or he will be treated like prey. If he looks confident, then they might think twice before they attack him. All he needs is that moment of hesitation for him to kill himself.
He flew past the ringed base and the pillars attached to them. He rose even higher and picked a throne which he sat on. The thrones are for demon Kings while the pillars are for demon lords. He sat down and even relaxed his posture. Meanwhile, the demon gods were observing him intently while discussing among themselves furiously. Many of them want to swoop down and snatch him up right this instant. They want to disregard civility and indulge in their desires.
"I want him. I want him now."
"I must have him now."
"Give him to me. I just want a little taste."
Three different demon gods clamored for him.
Demon gods are beings without restraint. They are the very definition of their sins. They gained control over their sins but they were also influenced heavily by their sins. GREED, GLUTTONY, and ENVY want to get him immediately. But WRATH, CARNAGE, and LUST are against it. While the other four demon gods are on the sidelines content with just watching.
SLOTH is not actually against grabbing Aeternus. It is against doing anything at all that's why it is on the sidelines. It wouldn't have come here had it not been dragged by WRATH. If not for being dragged, then it will be somewhere else sleeping.
As for the other demon gods on the sidelines, they don't care about Aeternus enough to try and get him or try to protect him. PRIDE certainly doesn't give a hoot or half about the weird demon king. It believes that it is special, unique, and the best thing in existence. Anything else is lower quality and not worth its attention.
The one that led the side of reason and decorum is WRATH. WRATH clearly has a vested interest in having this meeting go well. It brought the laziest demon God here and it doesn't want a demon king to be attacked in front of everyone at a meeting that he called for an important aim. He swore to guarantee the safety of everyone who attends the meeting and he will make sure of it.
The disruption that attacking Aeternus right now will cause will hinder their plans for the era of conquest. For once in the history of the abyss, all the rulers have to come together and they need to unite. The demon gods need everyone's help. CARNAGE and LUST backed WRATH up so they are at a stalemate on what to do about Aeternus.
They discussed more about him. They agreed to hold off on attacking him until the meeting is done with. And the attack has to be done discretely or the other demon Kings will get nervous and the demon gods will lose their credibility. It won't help their unity if a demon king is killed by a demon god.
"Fine." GREED said. "I will get him later."
It agreed to the proposal to hold off but it couldn't stop looking at Aeternus. Greed pulled at its mind the more it looked at Aeternus. It wants to get to the bottom of Aeternus's secrets but it can't, for now. So it decided to ask a question.
"Hey, you." It called out to Aeternus. "You're the newest demon king. Are you not?"
It didn't wait for an answer. "Why did you come here in your main body?"