Simple. I'll start off with a list of characters from a specific group and then, twice a day, people can vote to have a character go up a rating and a character go down a rating. Ratings will start off at ten. This is the example for the characters, which will be from the World of the Living (during the first Arc) group:

Ichigo 10
Rukia 10
Kon 10
Yuzu 10
Karin 10
Mizuiro 10
Keigo 10
Orihime 10
Uryu 10
Isshin 10
Tatsuki 10
Chad 10
Chizuru 10

If you would like to know how it works, better, then visit the Angel Beats spot, where there is the same idea game, that is still operating. Also, when you post, make sure you copy and paste from the last person's post, so that you don't have to write it out each time!