Names are arbitrary; they don't have to make sense, they just have to be unique enough that you don't get confused in regard to who/what is being referred to.
After all, Windows 8 was followed by Windows 10; if it's good enough for Microsoft...
To me, not having played the game or being at all familiar with it, I still caught that it was a joke.
You might also consider this:
The whole reason for this special class is to shake things up, yes? So why not start right from the beginning, by making the class name differ from your expectations.
From that perspective, it's actually not a joke, but a deliberate effort to kickstart the student's looking outside the box of their preconceived ideas of how things work.