Nightblade

Theory related to the returned: The connection between lifeless and awakened inanimate objects are they both need commands and someone to think/command them, That would make the returned and Nightblood connected, A human who came back and is sentient and a inanimate object that has sentience, Returned how they perceive themselves is how they look So would how Nightblood sees himself how he manifests? Could he change forms, or get a body like a human?