Conversation so far:
What was Voldermort's character like?
Voldemort was invented as a nemesis for Harry Potter.
What are some of his character traits?
Voldemort hates non-pure-blood wizards, despite being a half-blood himself.
How did they base decide what his character was going to be like?
CANNOTANSWER.
What did Voldemort accomplish?
CANNOTANSWER.

Question: What else is interesting information?
Self-contained rewrite: What else is interesting information about Lord Voldemort other than character traits and accomplishments?