User blog comment:Xilinoc/Ch. 546 - THE LAST 9DAYS/@comment-6963992-20130718235440/@comment-11051098-20130719091343

I'm wondering... I watched the episode again recently where Ichigo arrive in the real Karakura Town inside SS with Isshin on his shoulder, ready to fight Aizen. He put Isshin down on the ground, and left him there.

Rangiku was just mere meters away by Gin's body, she could have easily come by out of curiosity to find out who Ichigo's dad was, and discover that it was her former captain, if she recognized him. He has aged after 20 years in a gigai, but his face should roughly be the same, and his reiatsu too, even though he had a full beard after 3 months in the Dangai.