
Quick answer — Tomoe Hanba voices Jean in Lupin the IIIrd: Fujiko's Lie, Kouko in Junji Ito Maniac: Japanese Tales of the Macabre, Etna in Netherworld Battle Chronicle: Disgaea and 14 more characters.
Tomoe Hanba voices Jean (Lupin the IIIrd: Fujiko's Lie), Kouko (Junji Ito Maniac: Japanese Tales of the Macabre), Etna (Netherworld Battle Chronicle: Disgaea), Haruka Katayama (Kimi ni Todoke: From Me to You), Sumika (Haibane Renmei), Franken Stein (Soul Eater), Mikoto Utsugi (The King of Braves: GaoGaiGar), Naoe Mihashi (Big Windup!) and 9 more.
Jean is voiced in Japanese by Tomoe Hanba.