Board Thread:Questions and Answers/@comment-35699933-20190516212405/@comment-957629-20190517113930

Yeah we don't know if an Adjuchas or Gillian that becomes and Arrancar can become the level of a Vasto Lorde or Adjuchas in the same way they aimed to before.

Really we don't know much about the origins of the Vasto Lorde, just that they are humanoid Menos Grande Hollow that exist and are really strong.