Categorize the following characters into heroes and villains.
Harry Potter, Voldemort, Hermione Granger
Heroes: Harry Potter, Hermione Granger
Villains: Voldemort
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the following characters into heroes and villains.

### Input:
Harry Potter, Voldemort, Hermione Granger

### Output:
Heroes: Harry Potter, Hermione Granger
Villains: Voldemort