Uchiha_Kazuki

Yes, the MC use soul power Instead of Chakra. The reason why The MC can use element power is because one if Rinnegan ability that allow the user to use all elements power. Because his Rinnegan now supported by soul power, the Rinnegan grant him the ability to use jutsu element using soul power.

I'm not sure for now. I plan to decide it later.

They're genetic trait like in the Naruto World.

I never to plan the MC to become Madara that can easily overcome all the problem since his appearance. I want to create character like Sasuke that still very strong and have cold personality but not entirely invincible either. And to be honest, I actually want to avoid the MC become like how you explain it because it would divert the story from my original purpose.

I think my carelessness make some confusion and let you think the MC actually became fond of her. I'm sorry for that.

Are you talking about Ning Rongrong? I think I forget to stated he actually want to get revenge on her later. So he's actually don't do anything to her because he's fond of her.

I just noticed that. Sorry for the inconvenience, he's should be around level 78 at this time. I'm to lazy to watch again that time and check the wiki that stated he's level beyond level 80 and realize the mistake after you point it. So thank you for your comments and I'll fix it right away

I'll fix it right away

Oops, my bad...

And about the disguise, because her ability to disguise came from a soul bone, I think she can change to her original appearance or disguise easily. The reason I believe this because there's no way She's gonna use Crown Prince identity to hunt a soul beast because is extremely risky. Because if someone found out that The Crown Prince actually have angel martial spirit her disguise would be over. So it would be better choice that she use her real identity for hunting soul beast and changed her identity again when she's back.