The succubus queen felt the change in the atmosphere immediately after she entered the plane. It is a distinct feeling of alienation that lets her know that she is on someone else's territory. This plane has a Sovereign and she isn't the one. She knows without a doubt that the Sovereign of this plane can suppress her. But she isn't worried.
The feeling is a warning to her to behave herself. But she doesn't care. Instead, she spread her presence wantonly and with reckless abandon despite that warning. She feels no fear of being in his territory and feels no need to hold back.
The air stagnated due to the pressure of her existence. The demons in the plane were pressed to the ground no matter where they were. Some demons directly exploded. But there was no Chaos. The abrupt massacre didn't rile the demons up. There was only deadly silence.
The succubus queen smiled smugly. This is something she wouldn't be able to do in a normal situation and on her own. It is also something she doesn't even need to do. The Reaper must already know that she is here and he must know who she is so she doesn't need to announce her presence but she did it anyway. She did it with the smugness of someone who won a game.
"He thought he could cheat me. I have won now. Maybe I should ask him to have sex with me. I should make it one of his conditions for surrender. I want to humiliate him with sex." She thought to herself.
Then she roared with a mighty shout, "Reaper, where are you? Is this how to greet guests? Show yourself."
She is putting up an imposing manner in someone else's territory and she likes it. The wide smile on her face is a very good indication of how much she likes it. She also didn't need to ask where the Reaper is. She can feel his presence and tell where he is. He seems to have a weight that he didn't have before. That weight is pressing on her and warning her that he is dangerous. But she isn't afraid.
It isn't odd that his very presence is threatening her now unlike before. He is supposed to be stronger in his plane after all. The fact that he used the Authority of a Celestial Supreme to reinforce his plane explains why he seems very heavy and dangerous. But no matter how powerful he is, she has more powerful allies. So she isn't afraid.
"Not bad." She said haughtily as she observed his plane.
She knows where he is but she didn't address him immediately. She wants him to stew in fear and trepidation before she swoops in to rob him of everything that he is worth. So she took her time to examine the plane. She turned around with a dramatic flair to face him when she was done observing his plane. It was then that her eyes caught sight of the core of the plane.
Her eyes narrowed at the sight. Her pupils literally became as tiny as pins. There is nothing special about his plane but the core of the plane is very special. In fact, it is too special. The bright star is not the anomaly that is making her take a long look to ascertain what she is seeing. It is the golden halo around the star that is the cause of her agitation. To be precise, it is what makes up the halo that caused her to squint her eyes.
"Oh shit. Reaper is an abomination." She cursed silently in a voice that is barely a whisper. "We are doomed."
They are very small compared to the star that they cycle around but she can see the crowns that make up the halo and she can see that they are 36 in number. She understands the implication immediately. Now she knows what the Reaper does with his captives. She also understands why his plane has an increased defense.
"We are doomed." She repeated even weaker than the first whisper.
It is almost like she is having difficulty speaking. The pressure of the Reaper's existence is finally having some effect on her. It is making it difficult for her nonexistent lungs to expand and breathe. She seems to be suffocating or drowning in an ocean of regret.
She feels regret because they were wrong. The Reaper didn't need to use the Authority of the Celestial Supreme to reinforce his plane. He doesn't need it at all. Any plane will be very strong too after being reinforced with 36 crowns.
If that is true, then the apparent external defense of the plane must have been a lie. She shouldn't have been able to break into the plane at all. Unfortunately for her, she didn't have to. The door was opened to her immediately. It was not the respectful invitation she thought it was. It was the beckoning of death.
The Reaper didn't let them in easily because he was afraid of them. He let them because he didn't want them to realize that his plane is too strong and be scared off. All of these understandings slammed into her mind and brought a single word to mind. That word is "Abomination."
"We are doomed." She thought to herself.
She can't speak anymore. She can only think. Most of what she is thinking about is how she regrets coming here and how the Reaper is an abomination. He is a demon king that feeds on other demon kings.
And much worse than that, he is a demon king who will be able to feed on other demon gods once he becomes a demon god himself. He is a demon king that will definitely reach the rank of Chaos entity if he manages to become a demon god.
That means he is a predator that she shouldn't have messed with. She knew all of this too late and it made all her strength leave her body. Hence the overwhelming feeling of regret.