what can you tell me his personality?
A "raging psychopath, devoid of the normal human responses to other people's suffering", and whose only ambition in life is to become all-powerful and immortal.
Lord Voldemort
Rowling described Voldemort as "the most evil wizard for hundreds and hundreds of years". She elaborated that he is a "raging psychopath, devoid of the normal human responses to other people's suffering", and whose only ambition in life is to become all-powerful and immortal. 
when did harry potter deathly hallows come out 21 July 2007. what kind of a work is it? It is a fantasy novel. who composed it? It was written by J. K. Rowling. what is the storyline? The novel chronicles the events directly following "Harry Potter and the Half-Blood Prince" and the final confrontation between the wizards Harry Potter and Lord Voldemort. are there videogames based on it? Yes, two action-adventure video games. are there any prequels to this novel? Yes, Harry Potter and the Half-Blood Prince. who is the antagonist of the movie? Lord Voldemort. is he known by any other name? Tom Marvolo Riddle, "You-Know-Who", "He Who Must Not Be Named", or "the Dark Lord". who developed this character? J. K. Rowling.
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Lord Voldemort [SEP] Personality
Rowling described Voldemort as "the most evil wizard for hundreds and hundreds of years". She elaborated that he is a "raging psychopath, devoid of the normal human responses to other people's suffering", and whose only ambition in life is to become all-powerful and immortal. He is also a sadist who hurts and murders people—especially Muggles—for his own amusement. He has no conscience, feels no remorse or empathy, and does not recognise the worth and humanity of anybody except himself. He feels no need for human companionship or friendship, and cannot comprehend love or affection for another. He believes he is superior to everyone around him, to the point that he frequently refers to himself in the third person as "Lord Voldemort".