So far so good.
She and Hinata went on play dates in the park, under heavy supervision from both clans. She braided Hinata's hair, included her in games, and made sure she knew Miko liked her. Miko found herself genuinely enjoying her company.
She suggested that maybe they should have a sleep-over.
And so, their first sleepover was at the Uchiha compound. Hinata's now slightly pregnant mother had packed her a night-bag. They didn't stay up so late-almost three year old's had limits. But when she woke up, cuddled next to Hinata who smelled like lavender and let out cute little snores, she thought she could get used to this.
Sasuke was annoyed cause he wasn't allowed to sleep with the girls.
But when they all came down and the entire family including Hinata was treated to one of the best breakfasts they had ever eaten, he calmed down. A knock at the door had Itachi getting up to answer. He came back with the Hyuga clan head.
Sasuke choked on his tomato.
Mikoto offered him some rice and surprisingly he nodded, eyes scanning his daughter and satisfied when she was unharmed. Indeed, this was possible the happiest she had ever seen her.
It was tense, but not unbearably so, and when Hinata left, her father gave Miko one last considering look. She shot him a toothy grin.
As it was his house, Fugaku didn't need the elders permission to let Hinata stay overnight. It was when Fugaku looked at her over his plate of food with a proud smile she knew this would become a thing.
The next time she slept over, it was at Hinata's house. They were very hospitable and ever more traditional than the Uchiha. It wasn't unpleasant, however, and she thinks she impressed them with her manners she had learned from Okaa-san.
It soon became a thing. Hyuga clan members and Uchiha nodded politely in the streets to each other instead of glaring, and worked better together on missions, the daughters of their clan head's on their minds.
The other noble clans noticed their two strongest clans on better terms with each other and wanted in on it. Which meant play dates and meetings. A lot of them.
It was at one of these meetings she heard one of her cousins and Shino's cousin speaking about Kumo coming to town in three days. She sucked in her lower lip nervously and went to ask her parents for a sleepover.
On the day Kumo arrived, she and Hinata were putting braids into each other's hair and learning how to put messages in flowers. Instead of instantly falling asleep like she normally would, she laid wide awake. It was her turn to let Hinata sleepover, and just by stretching her evidently underused senses, she could tell there was nearly double the guards, as there always was when they had a sleepover.
With that reassurance in mind she fell asleep.
She woke up to shouting.
At least ten of her relatives plus her parents were in her room, frantically asking if they were alright. Hinata clung to her, and much to her shame she clung back. Mikoto made them hot chocolate as the situation cleared up. Fugaku and Hisahi were both missing.
They weren't let out of sight after that, Hinata's mom coming over.
It took awhile, but she learned that when the Kumo-nin realized Hinata wasn't in her room, he radioed his other accomplices, who searched the area. He was quickly apprehended. The other three had closed in on the Uchiha, only to be incapacitated by them. All nin survived for interrogation.
The Hyūga gave a public official thanks to the Uchiha, leading to Konoha's two most powerful clans to be on the best terms in their entire respective histories.