Most of the characters (at least up to episode 5, since I haven't gone any further) seem to have both class and subclass:
- Akatsuki: Class - Assassin; Subclass - Tracker
- Shiroe: Class - Enchanter; Subclass - Scribe
- Nyanta: Class - Swashbuckler; Subclass - Chef
- Serara: Class - Druid; Subclass - Maid
However, Naotsugu (whose Class is Guardian) appears to not have a Subclass.
From the Classes and the Subclasses page on Log Horizon Wiki, one can tell that once a player starts playing Elder Tale he has to choose a Class, which cannot be changed again. However, one also gathers that Subclasses, on the other hand, are changeable, but the site says nothing about whether or not a player is required to have one.
Does this mean that Subclasses are not required?
Or was Naotsugu's class just not yet revealed/unknown?