system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] 'Green Lantern' is Hal's superhero moniker... as well as Kyle's/Guy's/Jessica's etc. But isn't it more like their job title? Why don't/haven't they come up with their own monikers?

It would be like calling yourself 'Police Officer'. Or if Superman called himself 'Kryptonian' as a superhero. Besides, wouldn't it also be confusing out on the field? 

E.g. "Green Lantern! No, not you, Hal. And no, not you, Cruz. I meant John!"
gpt
Usually there’s only one human Green Lantern at a time. They’re *the* Green Lantern for our sector. It’s more akin to what we have as Sheriffs. There’s usually only one Sheriff per county. So, when someone address someone else as Sheriff, you know who they’re talking about because there’s only one.

However, when there are multiple Green Lanterns in a place, most would just refer to someone by their name (eg Hal as opposed to Kiliwog or Rayner).