Ironically what you're describing is almost exactly what Samurai 8 was, verbatim. There was a foreign designed princess our protagonist who had to protect whom he was literally bonded to by the power system. We DID have an animal anthropomorphic master travelling around with his student that still contained x forbidden/demonic power inside him. You want to know what's funny about all this though?
It fucking sucked. Seriously, I'm beginning to wonder now as to whether or not Kishimoto was one of those one hit wonders who only got by because of his team. Perhaps Naruto was just lightning in a bottle and Kishimoto did most of the art while being under heavy monitoring and editing. It would explain why as Naruto grew in popularity and Kishimoto got more creative control that it began to flop so hard.
I don't know how many of you know the story around Sakura and the effort Kishimoto went through to try to connect readers with her. Apparently he read dozens of books on how to write teenage girls to make her more appealing but he just couldn't get the audience to connect with her. It makes sense though that maybe Kishimoto is just bad at writing and needed support of experienced editors to bonk him on the head and say "No. That's a dumb idea". I mean, it'd explain some of the insanity we see in Boruto...