In late 2004, Tsunku's choice of giving Konno the main vocals for "Namida ga Tomaranai Hōkago" yet again surprised many people, as it was known that she had rather weak vocals when compared to the other members.
In 2008, like in previous singles (a notable exception being Namida ga Tomaranai Hōkago), Michishige was given a relatively minor role both in Resonant Blue and Pepper Keibu, with the exception of a solo line in the latter.