User blog comment:Xilinoc/Ch. 644 - BABY, HOLD YOUR HAND 7 (Never Ending My Dream)/@comment-5303512-20150924113750/@comment-5693502-20150924132225

Yippee, Hitsugaya's back... ¬_¬

I don't think Hitsugaya being Isshin's former vice-Captain is much of a connection to Ichigo to be honest. Hitsugaya is definitely no more important story-wise than some of the people Kman mentioned, he's just a lot more popular in the fanbase.