Junko Tange

The president of Green Entertainment. Junko is an adult woman who has a pretty foul mouth and smokes frequently.

She was born in Kumamoto Prefecture in southern Japan, lived in Tokyo and Osaka, and then ended up in Sendai far from her birthplace. When Green Entertainment lost it's last talent, she sends Kōhei Matsuda to find a new idol group.

(Source: Wake Up, Girls! Wikia)