Special page for
Love Live! Sunshine!! is available with character introductions:
http://www.lovelive-anime.jp/sp_sunshine.html
You can also find translated character descriptions here:
http://www.seiyuuri.com/2015/03/31/l...ions-revealed/
They're taken from Dengeki G's Magazine May 2015 issue as a source, though. I don't know if these are identical with the images above.