Comprehensive information about the character Hokushin from the film Martian Successor Nadesico: The Motion Picture - Prince of Darkness is unavailable. It is known that Hokushin is a character who appears in the film as a member of the antagonist forces. In the narrative, he is present at the Shirahime colony, where he makes a remark about destroying it, indicating his aggressive and destructive nature. Outside of this, specific details regarding his background, personal motivations, his precise role in the film's complex plot, his relationships with other characters, any personal development he undergoes, and his unique abilities cannot be provided from the available reference information.