The main villain of Bleach has never shown his Bankai, does he have one, or is his raw power really that great? Gillian is the lesser of the Great Hollow classes, but they're still very dangerous ...

We learn in part 2 that Quincies have a physiological intolerance to Hollows, so why didn't the Visoreds use Hollowfication ...

Bleach is famous for its huge cast and many relationships have been confirmed to be canon throughout its long periods.