I tried my best at tagging the above characters, and a character check would be appreciated. I assume the bottom half is from the manga, which I have not read yet, so help with that too would be nice.

bored_man said:
I assume the bottom half is from the manga, which I have not read yet

Correct, last arc (useless characters btw (except enishi obviously))

The artist should be penalized for making this in any resolution less than wallpaper-sized.