That is, there are five basic elements in each soul, and each are subdivided into various other elements. It is more complicated than that, but that will do for a start. At this time, I am not going to define the different various spiritual elements of a person's soul, nor will I explain what each does and what each is for. That would be a major effort, and the Internet is in any case not the medium for such a lesson. In brief, the lowest level of the spiritual elements, the most physical, is the nefesh, which gives life and animation.
Animals have nefesh also.
The naranchai is not the source of a person's good traits, unlike the beliefs of Christianity. The naranchai is spiritual, so yes, it desires spirituality. That causes within the human the desire to reach out towards the spiritual, to fulfill the natural needs and desires of the naranchai, even as the body needs to have its needs fulfilled as well. Good traits come from good education, a good upbringing, a good nature, exposure to good influences, and the wisdom and knowledge of maturity. Some parts of a person's spiritual essences remain at the grave for either eleven or twelve months, I forget which.