Marcelo_Ferreira
For now, I just can say you good luck. It is hard to give an pinion just with it. It exists thusands of Naruto fanfics, and most copy between them. If it is just for enterntainment or train writing skills, write whatever you want. If you want an impactacting fanfic, you should to think a premise to write a fanfic with a setting never thought previosly
it is new and and interesting. though with the yang and wind attributes would he also have affinity with ice and cold and would he have beast like instincts like a dragon slayer as he is more in tune with the 7 tailed fox. also how would his mentality be as two souls while similar still have conflicting ideologies and different perspectives on what is righteous and what is wrong ?