Half of kuramas chakra also meaning lifeforce is inside naruto. While the other part is sealed.
From that side he appears to be evil.
Do you think kurama had a natural good side?
No he didn't have a good side.
Moreover, kurama was just a mass of chakra to begin with, but every mass of chakra doesn't turn into a tailed beast.
So the other half is JUST Chakra which is sealed inside minato. The real part of kurama which has its own personality is sealed within Naruto