Half-Blood Prince, Chapter Seventeen
So after a quick, one-chapter-long detour, it’s back to Hogwarts for Harry, and back to memory-watching for us. I love the insight these chapters give us, not just into Voldemort, but into Dumbledore – we learn what he’s been up to, what the focus of his life has been in recent years, and indeed a large part of why the Order of the Phoenix exists. After all, would you confide in the Ministry if you learned of the Horcruxes?
These chapters are also a big part of the reason that this is the first book in which Ron isn’t the second most-mentioned character after Harry (it’s Dumbledore instead; Ron is third). The focus of the series is turning away from the kids and towards the adults, and finally resting squarely on Voldemort.
Harry Potter and the Half-Blood Prince, chapter seventeen: ‘A Sluggish Memory’
Of course in the seventh book the second most-mentioned character isn’t Dumbledore OR Ron, or Voldemort for that matter. Trivia question of the day – who is it?

Where did you find this most-mentioned character list? Seriously, did someone sit and count the number of times each character was mentioned.
As for 2nd most mentioned character in DH, Hermione?
Clare said this on May 20, 2010 at 7:45 am
I want to guess Hermione too …
empirexstate said this on May 20, 2010 at 10:52 pm
Hermione for me too. Who else could it be? Unless…. Snape??? Nah.. I think it’s our “Hermy”. :D And probably because Ron was absent for a few chapters in DH. I still can’t quite forgive him for that.
Pam A said this on May 21, 2010 at 9:07 am
Yes, it’s Hermione – edges out Ron thanks to the several chapters that he’s not around for in the middle of the book. Good call, Pam A. ;) I’ll be posting my source in the next few days, keep a look out for it.
John Kearns said this on May 21, 2010 at 9:10 am
Okay, my previous comment didn’t show up so I’ll repeat it here.
The second most-mentioned character in DH is probably Hermione. And probably because Ron was absent for a few chapters. I still can’t quite forgive him for leaving Harry and Hermione.
Pam A said this on May 21, 2010 at 9:12 am
okay.. apparently, it showed up. Sorry for the double post. And for spamming.
Pam A said this on May 21, 2010 at 9:14 am