User blog comment:12th Supernova/Secret Identity/@comment-5115277-20130815070446/@comment-5115277-20130815101806

I'll assign the avatar changing power to DP, since he did all the work on the other three (and I can't think of a good avatar).

For the hidden clue I tried assigning a letter based on the number of paragraphs in each blog, so if it's not that I don't know what it is.