Outline the characters in the given story.
Once upon a time, there was a brave knight who wandered in search of adventure.
The character in the story is a brave knight.
Complete the following task based on the instruction and optional input provided.### Instruction:
Outline the characters in the given story.

### Input:
Once upon a time, there was a brave knight who wandered in search of adventure.

### Output:
The character in the story is a brave knight.