
Quick answer — Shouko Tsuda voices Tomiko in Hajime no Ippo: The Fighting! New Challenger, Martha Marriott in SPY x FAMILY Season 3, Eiko Shimao in Millennium Actress and 12 more characters.
Shouko Tsuda voices Tomiko (Hajime no Ippo: The Fighting! New Challenger), Martha Marriott (SPY x FAMILY Season 3), Eiko Shimao (Millennium Actress), Haha (Kids on the Slope), Nina Lutz (Nodame Cantabile Finale), Izumi Curtis (Fullmetal Alchemist), Sakura (Sonny Boy), Yasuko Hayasaka (Paradise Kiss) and 7 more.
Tomiko is voiced in Japanese by Shouko Tsuda.