
Quick answer — Ikumi Nakagami voices Yukari Akiyama in Girls und Panzer, Io Mizusawa in White Album 2, Maya Yamato in BanG Dream! 2nd Season and 4 more characters.
Ikumi Nakagami voices Yukari Akiyama (Girls und Panzer), Io Mizusawa (White Album 2), Maya Yamato (BanG Dream! 2nd Season), Mayumi Kikuiri (Baka and Test - Summon the Beasts: Matsuri), Yuuji (Towanoquon: The Roaring Anxiety), Yuuta Midorikawa (Glitter Force), Rena Akinokawa (Red Data Girl).
Yukari Akiyama is voiced in Japanese by Ikumi Nakagami.