seen from Yemen
seen from Malaysia
seen from France
seen from China
seen from Malaysia

seen from Greece
seen from Romania
seen from Germany

seen from Singapore
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seen from Netherlands

seen from Netherlands

seen from Netherlands

seen from Netherlands
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seen from United States

seen from Netherlands
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Not the submitter, but Konno didn't get lines in most songs except Namida ga Tomaranai Houkago, in which most other girls didn't get lines. So it's difficult to find a song that represents 5th gen as a whole. Except maybe Joshi Kashimashi Monogatari.
All four got lines in:
Do It Now
Koko ni Iruzee
Morning Musume Hyokkori Hyoutanjima
As For One Day
Shabondama
Joshi Kashimashi Monogatari
Sexy Boy ~Soyokazi ni Yorisette~
Ambitious! Yashinteki de ii Jan
So I don't know what you're talking about when you say she doesn't have lines, that's not true. She's my ultimate oshi, I would know. In either case, 5th gen already has a representative song, Suki na Senpai, so I don't see why someone else thinks they need another? And if it's any of the singles it would be Do it Now.
Sayumi Michishige, Eri Kamei, Reina Tanaka
Sayumi Michishige, Eri Kamei