Quote Originally Posted by Janusz
You've got a point there. Though we haven't heard how the Adjuchas and Vasto's are 'formed', if it's something like a Menos or if they just are.
They're all "Menos Grande". Vasto's and Adjuchas are more powerful Menos.

So given that I assume all 3 types are made of many hollows.

The question remains if Gillians BECOME Adjuchas and Adjuchas become Vasto Lords, or if when a Menos forms its whatever of the 3 types it is right from the beginning.