Pandora Hearts is my bae. It's definitely one of my favorite mangas next to 7 Seeds.
The manga is 1000x better than the anime. The anime is great on its own, don't get me wrong, but it doesn't even compare to the way the manga ties everything together. The releases of these last volumes have been super slow, though. I'd re-read the manga while I wait if my heart could handle those emotions a second time lol The headhunter arc still gets me.
It's a really interesting how it references back to Alice in Wonderland and the sequel, though. There are a lot of very small references that are heavily implied but will probably never be verified-
like Lacie being Humpty Dumpty. Alice has two cats that are black and white and their mother, Dana, who she thinks was Humpty Dumpty in the rabbit hole (abyss). The two Alices in PH are white/blue and black/red, Lacie was their mother, and chains were originally people who fell into the abyss, so it makes sense that she would have become a chain.