I really hate how this artist never bothers properly tagging the characters on such large-group illustrations, especially since they're almost always not in any of their canon outfits. The least they could do is list the names in the description, like some artists I follow do.

Any help with identifying the remaining characters would be much appreciated. Please add a note over any IDed character using the format from the other notes, for everyone's convenience.

Thanks to all the help in identifying the characters. Only one girl left to ID: The one between Rika, Yomi and Koyori in the top middle part of the image.

EDIT: I'm suspecting that the last unidentified character - the green-eyed blonde girl in the middle with the hair intakes and what appears to be one half of a two side up - is sakurakouji tsukuyomi, but I'd like some second opinions.