Talk:ANGERME/@comment-28097681-20160718175337/@comment-131168-20160718182857

Not totally unique--Morning Musume has for the last ~3 years too. I don't know that there's been any official reason given for these moves, especially with "leader" mostly being a figurehead role. A speculation someone else had on the wiki once that I kind of like is that it gives a bit of leeway to work with. Like, by seniority Kana would be #2, but if for some reason she wasn't interested in being leader it would be weird if non-sub-leader Akari suddenly became leader.