Kana Hanazawa
One of the "complicated realistic elements" of Yukari's character was her sense of purity that only her voice could convey. Though it took days of listening to the audition tapes, Shinkai finally chose Kana Hanazawa, who had a very low natural voice, despite typically playing the roles of high-pitched younger girls. One of the things that impressed Shinkai about Hanazawa's voice was her ability to cover such a broad range of expression.