The third mozukage was recruiting class into their village after seeing how konoha win the was because of their shinobi's bloodline or kekkei genkai. Recruiting the Yuki, Yerumi and Kaguya until news heard about the new clan at the border of the Land of Hot Water. The Wazawai killing several missing nin and was get a little bit of that cash which would me needed to help the village.
When the Clan accepted a dual between Azushi and Nouzumi dualed for the title of clan head it was a tradition of both clans but in a dual of a man and woman of the Uzumaki Clan dual officially. It was seen as a proposal and if the man won it was a yes from the woman. Seeing this half of the clan was cheering for Azushi and later after his victory he announced their marriage. Months later in Kiri the clan settled in in a number of 25 members the smallest clan but was the most powerful.The clan house was in a baboo forests with a large small enough lake to fit in the clan compound.
Timeskip
Azushi and Nouzumi got married, Azushi was the clan head, struck a deal and explained their situation to the Third Mizukage who struck up a deal that the village will be sold seals and that they needed a jinchuuriki for the three tailed beast which Azushi agreed since it would also increase the answer power but Azushi wanted a seat on the council such did the other clan heads. Their fuinjutsu was helpful to call clans creating freezing and hyper explotion tags with the help of the Yuki and Terumi and due to their clan knowing medical jutsu they were in charge of the hospital. Finally Nouzumi gave birth to Zabuza seeing this Azushi now a advisor for the mizukage gave him the Wazawai Clan course which is year 1- 3 of the academy was to learn basic info and doing small D ranks which is optional, Also year 4-6 if you passed the exam to do Clone, Substitution and Transformation jutsu. You would then go into a specific course for you which is genjutsu, medical, Ninjutsu, Fuinjutsu, Kenjutsu, Shuriken jutsu and Ninja tactics. One problem funding which was solved my all the new clans mostly the Wazawai Clan to prove their loyalty.Also the mizukage stated that durvto the same numbers of the Wazawai Clan that so single men would be but in the CRA Clan Revival Attempt ( Don't know of that's correct but my lazy as ain't going to check) which made the have multiple wives. Knowing this Azushi made a seal to spread the bloodline within the clan by making all children born would be fully Wazawai only accepting the bloodline from the other parent which would get evolve becuase if any bloodline mixed with the Uzumaki Clan would evolve.
Three years later the mc was born his hair was red with one orange highlight. He was born with the Ketsuryugan activated but soon as his mom held him he was at peace since he never had a mother in his past life his eyes deactivated showing on purple and green eye