Ryoko Tanifuji (谷藤 リョーコ, Tanifuji Ryoko) is a Japanese voice actor, narrator, and radio personality. She was born on March 22, 1977 in Kyoto and is currently affiliated with Kyara. Her personal site is here.
She was surprised at Nagase's foul put-downs as it contradicts her cute appearance and is also the direct opposite of her in terms of personality. Tanifuji strove to keep that part of her, but also added a feminine charm to her tone with hopes of gracing Nagase with more character. She was directed to sound "like a bee" as well, which further challenged her acting ability.