This character is a spirit.

The spirit of a human being is the animating, sensitive or vital principle in that individual, similar to the soul taken to be the seat of the mental, intellectual and emotional powers. The notions of a person's "spirit" and "soul" often also overlap, as both contrast with body and both are imagined as surviving the bodily death in religion and occultism, and "spirit" can also have the sense of "ghost", i.e. manifestations of the spirit of a deceased person.