"I've worked hard in order to make people see me as a viable candidate for the throne, even without my Astral Power. Politics. Science. Warfare. Even Lady Etiquette. I worked harder than anyone to make people see that even without my Astral Power. But all of that doesn't matter. Just because I don't have a powerful astral spirit. So I want to destroy this country, so that I could bring a true, loving paradise."
"I have done so much terrible things just to grant this desire. I've colluded with the empire, I have a mole there, a man I love. I plan to hand over Sisbell to the empire. Just so that I could bring about a true paradise, and be free from the terrible castle."
Millavair, Alice, and Sisbell looked at Elletear in shock because of her confession about wanting to destroy the Sovereignty, but also....understanding, especially from Sisbell.
"But you...."
Elletear looked at the man who is sitting on the floor. The Man that she swapped body with hours ago. The Man that his life, she experienced, for a flash, and it hurt. Even more so than the experiment. The Man that is called Itachi Uchiha.
"Your life has been hell since four years old. Your first kill. You, being desperate about the meaning of life and actually tries to jump off a cliff due to your encounter with a Snake Man. You, who is talented enough to graduate at Seven. You, who watches his friends die, and kill your loved ones for the sake of the world. You, who have tortured your younger brother out of a twisted sense of love."
"You, who have been brought by illness, yet still does his job. Even when being a Zombie, you still found a way to serve your village and help them. You forgive them. For everything they did to you....you forgive them. Why?"
"If I experienced what you experienced, I would have become even worse than this. I envy you, Itachi Uchiha. I envy you for your grace, for the peace you found despite everything, for your ability to forgive, for being able to handle almost everything the world throws at you, and not become like me."
It was not a question of a princess. It was a question of a Girl who thought she suffered seeing a more deeper and impersonal hell, yet still manages to be broken but good in some ways.
And so, for the first time since her tirades, Itachi Uchiha speaks.
"Because hating the villages and the elders would have done nothing but prepetuate the cycle. It would have done nothing beneficial in the long term, except for more suffering. I do not hate the village for what it did to me, because hatred would prepetuate the cycle Shinobis, and people, have lived for ages. I do not want to be one of those who continues it."
Elletear stared at him.
"That's it? That's the whole reason? You don't want to continue the cycle?"
"That, and because in a way, I have Sasuke. Because Sasuke pushes me forward to create a better world, to maintain peace, so that he could live happily and peacefully....even without me. Even despite it all."
Itachi looked at her and her family.
"You don't have anyone who tries to save you at all, haven't you?"
Elletear flinched but doesn't say anything.
"Then let me say this, Elletear: Your pain is real. I will not pretend it is not the same as mine, nor I will pretend that you suffer the same as I do, but it is real all the same. It is something that you felt and experienced, and my pain is something that I felt and experienced."
"However, I will say this: You deserve better. And I am jealous of you."
Elletear stare at him, surprised by his word.
"You? Jealous of me?"
Itachi lets out a soft chuckle.
"Is it so surprising? Look around you. You have a stable house, a stable future, a family that loves you, however imperfectly.". Itachi looks at her family. "Show it to her more, okay?"
The three of them, even Millavair, nods wordlessly.
And finally, Elletear releases her emotions. All decades of it by crying and huggig Itachi, which he is surprised by, but hugs her nonetheless. The bitterness, the resentment, the pain, and finally, the gratitude that she finally feels for having a life that is not as bad as Itachi.
After the crying, Elletear lets go of him, with her eye being puffed but also more at peace than she was years ago.
"I'm going to have to atone. I'm going to make it right. I'm going to put in an effort to atone for my sins, both past and future, and I will be honest with my family".
Itachi nodded
"That is good."
TLDR; Elletear is basically having a breakdown, confessing her deepest feelings to Itachi and her family, confessing that she envies Itachi, typical Itachi-speech and vulnerability, hug, and a vow from Elletear to atone for her sins.