An NPC Subpath is much like a PC Subpath in that it is based around one of the main four classes (Warrior, Rogue, Mage, and Poet). But unlike the PC subpaths entry into the path is done through an NPC quest, and the paths have for the most part no unifying RP, but anyone who is a member of the appropriate main class can join as a result. They are based around the idea of the fourth mythical totems of Korean myth.
The NPC Subpaths are as follows
Warrior: Chung Ryong
Rogue: Baekho
Mage: Ju Jak
Poet: Hyun Moo