
Quick answer — Yuri Yamaoka voices Tatiana in SHIROBAKO: Gekichuugeki Animation, Erika Yano in SHIROBAKO, Yuuko Yoshikawa in Sound! Euphonium and 9 more characters.
Yuri Yamaoka voices Tatiana (SHIROBAKO: Gekichuugeki Animation), Erika Yano (SHIROBAKO), Yuuko Yoshikawa (Sound! Euphonium), Chocolat (Yumeiro Patissiere), Ai Shindou (Beyond the Boundary), Cento (Love, Chunibyo & Other Delusions - Heart Throb -), Yuuki Utsugi (Girls und Panzer), Choi Mochimazzi (Tamako Market) and 4 more.
Tatiana is voiced in Japanese by Yuri Yamaoka.