Board Thread:Improvements and Issues/@comment-15519592-20130815082945/@comment-11051098-20130816144203

Good points. But look at Nakeem Grindina, his Arrancar mask was very similar to his Gillian mask. I still think that similarity means that the Gillian with the "4-slot mask" could very well be Shawlong.

But as SunXia mentions, seeing as the part where this Gillian appears is about Grimmjow's past, it could be him. Although I think the difference between the Gillian's mask and Grimmjow's Adjuchas-form mask is too big, it doesn't have the slightest similarity as far as I can see.

But Shawlong, as well as his other future Fracción, appears in the flashback of his past. So I still think it's possible that the "4-slot mask" Gillian can be Shawlong.

Regarding BG9, we don't know if he's an Arrancar or a human. His mask could be a regular mask covering his face, it could be an Arrancar mask, it could even be a regular mask hiding Arrancar mask remnants. And as of that matter, Äs Nödt could be an Arrancar too, he could be wearing his half-mask to cover Arrancar mask remnants similar to e.g. Harribel's or Yammy's.