Talk:Spring 2014 Event/@comment-24297144-20140423204738/@comment-26035487-20140423220005

There is no “sparkle bonus”, there's just morale. Starting a sortie with all girls sparkling at, say, 50 morale and scoring less than an S rank victory will drop the morale of all girls below 50, losing the boost effect. It doesn't seem from the JSON exchanged between the game and the server that there's anything special about the visual effect besides being an indicator for this status.

Do correct me if I'm wrong.