Yeah, I'm wondering how that works. Do they follow their own code of ethics? Or the laws of another land? Perhaps from a "higher power" (without being a cleric)? 🤷
As far as I'm aware, anyone with a strong code of ethics can be lawful, even if that code does not match the law of the land you're on. Being good is a no-brainer, to the extent that any adventurer could be "good" (it's bloody work, after all). Besides all that, it could be a scout of some kind.