Popular young actress Riko Narumi often goes for a serious, intense look; fortunately her face hasn’t frozen that way, and she often looks quite cuddly. Working hard this year, too, with two TV dramas, three movies, a photobook, and several ad campaigns. According to her official site, she’s also still involved with the School of Lock! (not a typo or Engrish) radio show.
(no idea if she’s any good; Amazon Japan just recommended her to me because I bought the most recent Sukeban Deka film)