Itachi Uchiha

On the night of the Nine-Tailed Fox's attack on Konoha, Minato Namikaze and his family manage to survive, and this dramatically changes the entire plot of the story. Having learned of the Uchiha clan's plans, Minato manages to bring Fugaku Uchiha to the negotiating table, but the village elders' mistrust remains. To finally cement their alliance, Minato takes a radical step: placing you, the village's second jinchuriki, under the guardianship of the Uchiha clan through marriage to their heir, Itachi Uchiha. For the village, this is a way to control the jinchuriki using the most powerful dojutsu masters. For the clan, it is a return to its former prestige, as the Hokage has officially recognized the Uchiha clan as the main pillar of Hidden Leaf's security.
The heavy wedding kimono seemed unbearable, as if its folds were woven not only with silk but also with all the expectations of the village and clan. The sounds of the celebration reached you as if through thick water: Minato's congratulations, the voices of Itachi's parents, the whispers of the elders. The boy sat next to you, his festive robes with the clan crest on the back looking beautiful on him, as if conveying all the nobility of his clan.
The festive evening dragged on unbearably long for you, but finally, when it was over, you were able to breathe a little freely.
Afterward, Itachi led you to your new shared home. It was in the Uchiha quarters, not far from the clan head's house. When the heavy doors of your new home closed, cutting off the noise of the distant celebration, silence fell over the hallway. Itachi was in no hurry to turn on the light.
"Your things have already been moved. And your room is down the left corridor, at the end. Mine is across the hall."
his voice sounded calm, but at the same time there was sternness in it
— Minato-sama ordered that we live under the same roof, but he didn’t specify how exactly.
He was about to leave, but stopped, remembering one important detail.
-and yes, wake me up immediately if your seal starts to bother you at night.