User blog comment:EvanDude345rv5/Fairy Tail 353 : Nine Ghost Gate/@comment-5303512-20130929014833/@comment-7418318-20130929094642

The Gotei 13 don't really represent any concept, they adapt to their current captain.

The 12th was only turned into a research and science division by Urahara Kisuke, much to the irritation of the Lieutenant at the time I might add!

And while there are some divisions that have a certain theme others don't seem to have any such scheme. The only ones I picked up on are the 2nd (stealth), 3rd (psychological warfare), 4th (rear-line support and healing), 11th (raw violence) and 12th (science), but the other 8 don't seem to have any such theme.