
Quick answer — Chiharu Kitaoka voices Taketo Akutagawa in R-15, Sarasvati in Is this a Zombie?, Threia Hazelgrimm in Atelier Escha & Logy ~Alchemists of the Dusk Sky~ and 5 more characters.
Chiharu Kitaoka voices Taketo Akutagawa (R-15), Sarasvati (Is this a Zombie?), Threia Hazelgrimm (Atelier Escha & Logy ~Alchemists of the Dusk Sky~), Danguard A (Robot Girls Z), Takumi (Recorder and Randsell), AR18 (Upotte!!), Saeko Suuga (A Dark Rabbit has Seven Lives), Furan Takaki (Maken-Ki! Battling Venus 2).
Taketo Akutagawa is voiced in Japanese by Chiharu Kitaoka.