User blog comment:Uraharattack/Grimmjow or Gantenbainne? Maybe both?/@comment-7092747-20130729175049

Unless Harribel's fraccione were killed by Quilge, we know they'll be around. While it's possible the mysterious person could be Gantenbainne, the style of language used and the knowledge of Ichigo rules him out as Gantenbainne never met Ichigo...