"Pulling an Azu" is a term you'll hear often within the guild.
Usually in the castle roleplay forum, there is a main plot line or saga going on. But sometimes we decide to pull an Azu. It basically means, "random bit of castle roleplay".
The Azu has nothing to do with the main plot, but still takes place in the castle with the castle characters. It's basically a free ticket to experiment with willy nilly plots, explore character emotions, practice fighting, and not have any serious affect.
To make things less confusing, Azus are separate posts that usually have Azu in the title. So feel free to join one if you see one going.