Imagine my surprise on knowing two seiyuus who worked on K-ON! were also behind two major character's roles of an ecchi series.
First, we got Aki Toyosaki who voiced:
Also voiced:
Tomo Yamanobe of Seikon no Qwaser. I thought she managed to nail the 'airhead' role down to a T for both of them.
And Youko Hikasa who voiced:
Also was behind the voice of:
Kurae Ekaterina of Seikon no Qwaser as well.
Quite surprising considering the polar opposite personalities she was able to pull for both characters.
Last, but not least, Yukari Tamura, whose popularly is known for doing the role of:
Also did the following past anime heroines, one of them my current waifu:
Celica Yayoi of Solty Rei.
Ranpha Franboise of Galaxy Angel.
Morino Ichigo of Please Teacher and Please Twins.
Yuta Kanami of S-cry-ed.
Midori Sugiura of My Hime and My Otome.
She even voiced this villain from, guess what...
...Seikon no Qwaser yet again.